playing with fire and water

turbot broccolini cauliflower

Historically, the Brassica family, whose members are collectively known as cabbages, has seen its ups and downs. At its high point in ancient times, cabbage was prized by the Greeks and Chinese. It hit its low point in the Middle Ages, when medieval superstition suspected leafy greens of causing disease and it was deemed too coarse for the delicate European aristocracy. For centuries following, cabbage and its ilk were regarded as food fit only for peasants and livestock.

Today, the genus Brassica has the distinction of containing more important agricultural and horticultural crops than any other genus. The Brassicaceae family is remarkable in that all parts of their species have been developed for use as food:

    seed- mustard and canola/rape 
    flowers- cauliflower and broccoli 
    leaves- cabbage, kale, collards, brussels sprouts, mizuna, bok choy,
                arugula, and watercress     
    stem- kohlrabi  
    roots- turnips, rutabagas, radish, horseradish, wasabi, and daikon 
 
All of these plants are united and identified by their four-petaled flowers that form the shape of a cross (hence, the old classification of Cruciferae) and by their pungent flavor attributed to glucosinolates.

Glucosinoltes are a type of organic compound that contain both sulfur and nitrogen. Plants use this compound as a powerful defense system. Nutritionally, glucosinates are dichotomic— on the one hand, they can be toxic to humans and animals when consumed in massive doses, but in subtoxic quantities they become beneficial and are even known to produce anti-cancer enzymes. Glucosinolates are directly responsible for the strong, bitter flavor of Brassica that we either love or hate. I have to side with the Greeks on this one.

 

Brassicas, in one form or another, are always present in my vegetable bin. I'm a fan because they lend themselves to many different preparations. I love them all.

There is something fundamentally satisfying about the snappy texture of barely-cooked broccoli and cauliflower that appeals to the grazer in me. When I want something heartier, I slowly braise them in stock until they practically melt. Braising works well with leaves, stems, flowers, and roots, though vivid colors turn murky when cooked this way. Alternately, I toss the blanched, fleshier Brassicas in olive oil, spread them out on sheet pans and roast them in a hot oven. Their frizzled, dark edges are irresistible. 

Brassicas contain varying levels of glucosinolate depending on their species, with brussels sprouts leading the pack and cauliflower trailing at the end. Cooking methods directly affect the levels of pungency. A quick plunge in boiling water leaves the flavor molecules intact, while a long, slow braise leaches the molecules into the liquid, and gradually transforms them to a mellower, but funkier goodness. The dry heat of roasting intensifies flavor and adds a layer of complexity from the caramelized sugars.

Last spring, I tried the deep fried brussels sprouts at Momofuku. The outer leaves were blistered and singed, nearly black with char; their cores soft and pungent. It was a level of flavor— intensely bitter-sweet and nutty— that once experienced, you are changed forever.

 

turbot with a blanket of braised green cauliflower, white beans, preserved buddha's hand citron, 
 and black truffle
blanched broccolini stems, deep fried flowers

 
 

buddha's hand citron salt

 

My first inclination was to dehydrate the preserved Buddha's hand puree but some long forgotten piece of knowledge— an elemental fact, in fact— kept knocking at my logic, insisting that it would not turn out the way I thought.

It was the salt.

Salt does not evaporate. I learned that in third grade science class while standing over a pot of boiling salted water, watching the water vaporize and leave behind a film of salt clinging to the bottom of the pot. 

Common salt is an ionic bond of sodium (Na) and chloride (Cl). When it is dissolved in water, the Na and Cl atoms pull apart and seem to disappear. Take away the water and the atoms reunite because they are electrostatically attracted to each other. 

Remembering this put a spin on my intentions for the puree. Looking at it anew, I estimated that it was roughly 70% solids suspended in 30% water but there was no way to evaluate how much salt the preserved citron had absorbed. Judging from the taste— quite a bit. I had every reason to believe that if I removed the water from the puree I would be left with dehydrated flavor solids clinging to re-formed salt crystals, or an inherently flavored salt.

I would risk scorching the solids if I evaporated the water on a stove top. And I couldn't wait for the slow process of low temperature dehydration to find out. So I turned to the microwave.

After trying to heat a mass of the puree in the microwave, I quickly remembered something else I had forgotten: molten salt conducts electricity. Alarmed by the sparks flying around my 2-month-old microwave, I quickly removed it and thinly spread the puree on silpat and returned it to the microwave. It sputtered a bit, but no sparks. Ten seconds later, the puree had transformed to lacy fragments of crunchy, lemon-infused salt.

After my brain stopped reeling from possible uses, I was left with some questions:

• Could the process be hastened by simply dissolving salt in a puree and dehydrating, or did the six-week-long preserving affect the outcome?
  
• Did the acid in the lemon juice (used in preserving) come into play?
  
• Did the re-formed salt crystals trap the solids or are they clinging to the crystals?
  
• What is the yield point of a salt solution (i.e. how much salt can be added to water before it will cease to dissolve)
  
• How much salt is necessary for the product to qualify as a flavored salt instead of a salty crisp?

autumn leaves

I sometimes find myself out of synch with the seasons.

Like last week when I had to talk myself out of making spaghetti with jalapeno tomato sauce— a simple, summery sauce of barely cooked ripe tomatoes— because it was November. 

Or, like yesterday, when I booked a holiday cocktail party and my head filled up with visions of sugarplums and other wintry fare.

Today, the rake calls. It's all about the leaves.

Raking leaves is definitely not my ideal of fun. But like all chores, once I find a rhythm, it becomes meditative. Not today though— I'm too preoccupied with cocktail parties... and hors d'oeuvres.

Cocktail parties prevail in the weeks between Thanksgiving and New Years.  To my clients, a few hours of drinks and passed hors d'oeuvres means that they can entertain without the stress of formal dinner parties. There are no expansive (or expensive) menus, multiple place settings, or seating arrangements to deal with— just a well-stocked bar, a tasty selection of finger foods, and a capable staff to serve and execute.

I've seen a lot of hors d'oeuvre trends come and go in 20 years of catering. The once popular notion that anything wrapped in pastry or made in miniature was de rigueur is long gone. Modern tastes favor lighter fare with clean, bright flavors. (That said, I welcome the occasional request for pigs-in-a-blanket and sliders) 

Presentation, too, has come a long way. I remember etched silver trays with elaborate floral arrangements complete with trailing ivy that the servers carried around like bouquets. The food became lost in these. Nowadays, I aim for vibrant food, simply arranged on white porcelain platters. When the food lacks visual interest, I don't hesitate to add something to the plate— but only if it makes sense and adheres to the philosophy that nothing belongs on a plate of food that is not edible, functional, or relevant.

 

As I tackle the leaves, I think about canapes and how they're a fitting model for the perfect hors d'oeuvre.

Canapes cover a broad range of foods that we eat with our fingers. They run the gamut from basic cheese and crackers to the old-school French vol-au-vents and barquettes. In between are smörgås (open-faced sandwiches), crostini, and savory tarts. Their common denominator is a dry, crisp base that makes them neat and easy to pick up and eat, and a moist, often creamy, topping. The textural contrast between the two— dry and wet, crisp and creamy— are a basic gustatory pleasure and primed for an update.

 

Cheese & Crackers

goat cheese on carrot-beet-parsnip crisps
 

And as the leaves pile up, I think, again, about crisp.
 

How to reinterpret cheese and crackers?  
Start with the cracker and add flavor.
 

Crackers are basically flour, water, and fat. Certainly, doughs can be flavored with concentrated liquids or with dried flavor in modest amounts, but these introduced flavors are often muted by the large ratio of flour that is required to produce a crisp product. If the ratios are thrown too far off, we lose crisp.

Pure flavor can be extracted from produce with a juicer into liquid flavor and can be further concentrated or distilled, or the solids can be dehydrated and ground into powder. Potentially, these flavor-packed products can replace water and flour. But, of course, it's not that simple. 

Juice is not just flavored water, it contains fine solid particles and compounds. Fruit juices may also contain acids, pectin and reactive enzymes that effect texture. Ground dehydrated solids may resemble flour but do not possess the gluten that will allow it to behave like milled wheat. Luckily, we are not limited to wheat flour— or even starches from grains— to produce crisp.

There are other starches that gel liquids. They are so effective that only small amounts are needed. They don't interfere with base flavors because they are odorless and colorless. The gels, when dehydrated, form flexible films that turn crisp when heated. Technically, these are called glasses.

 

Unlike raking leaves, glasses are fun to play with. 
 

Ultratex is a tapioca-derived modified food starch that thickens liquids much like cornstarch, but does not require heat to activate. Adding 2-3% of Ultratex to a cold, thin liquid will instantly tighten it into a sauce. Thicker gels (5%) are quick to dehydrate and form crisp brittle films that are slightly papery.

Tapioca Maltodextrin is also derived from the cassava root. It is a mildly sweet polysaccharide. TM is best known for its ability to stabilize fats and transform them into powders. It forms slightly stickier films than Ultratex. When the two are combined, (at a rate of 18% TM to a 5% Ultratex gel) they form sturdy glasses that when baked at a high temperature during the final stage of dehydration (while they are still flexible) they make the most stable glasses, even in the presence of humidity.

Methylcellulose (A types) and Hydroxypropylmethylcellulose (E, F, and K types) also form films that dehydrate to glasses. Methocel glasses differ from Ultratex and TM in that when they are finished at a higher temp (100C), they turn from shiny and transparent, to matte and opaque.
 

Texturally, all of these additives produce thin, brittle crisps. 
Visually, the methocel crisp looked most like a cracker, albeit,a fragile one.
It needed more bulk.
Aeration gives the illusion of bulk without actually adding any.
Methocel F types are used to create and stabilize whipped things.
Problem solved.

making a mold of autumn leaves out of silicone plastique

Juice crackers:

 Bring 230g juice and 80g sugar or isomalt (isomalt is less sweet) to a full rolling boil. If the juice is not acidic, up to 10g of lemon juice can be added for flavor and balance. Remove from heat and allow to cool completely. In a small bowl, blend together 6g Methocel F50 and 8g Ultratex 8. Drop the powder blend into the center of the juice mixture. Cover the clump of powder with the blades of an immersion blender and blend until dispersed. Hydrate in the refrigerator for 4-6 hours, or overnight. With a mixer, blend until light, foamy, and opaque. Spread on silicone sheet or molds and dehydrate until film can be peeled off in one piece. Return to silicone and bake at 225F (100C) for 10-15 minutes. Immediately remove and bend or form into desired shape, supporting until it cools and hardens. Crackers can be made ahead and rebaked briefly to crisp.

To be clear, I use the term 'cracker' loosely. These are not crackers in a conventional sense— they lack flakiness. More accurately, they closely mimic the texture of a tuile or gaufrette wafer, but with the pure flavors of carrots, beets, and parsnips, un-muted by starch.

 

I'm dreading the acre of leaves that still need to be gathered and disposed of. 
In joyful procrastination, I've created another pile of leaves in the kitchen.
The irony is not lost on me.
 
As always, nature inspires.

carrot cake

Back when I was baking full time, I had a customer consult me about a dessert to complete a special meal for a houseguest. He explained that the guest was foreign and he wanted to serve him a classic American cake. I made suggestions, and after some deliberation he decided to order a carrot cake. Just before he left, he felt inclined to inform me that the guest was a world-renowned French pastry chef. When he dropped his name, I nearly fainted dead away.

In the ensuing days, I became obsessed with carrot cake. It occupied my every thought. It infiltrated my dreams and became fodder for nightmares.

I knew that I had to hit this one out of the park and that the bakery's recipe that I inherited was not going to cut it. The frosting was easy-- it had to be cream cheese and butter, lightly sweetened and brightened with lemon juice. The cake was the crux. I gathered and analyzed every recipe that I could find, looking for the je ne sais quoi that would make it distinct. I made small test batches using various additions of nuts, coconut, pineapple, and even chocolate chips. These, I decided, were perversions and only distracted from what I wanted to achieve: a refined cake with a fine, moist crumb that tasted of sweet, caramelized carrots. It was back to square one.

I started with the basic structure of the cake: fat, starch, sugar, liquid, eggs, leavening, flavoring, and looked at their ratios. While oil (typically used in carrot cake) ensures a moist product, it makes it... well, oily. I opted for the flavor and texture of butter-- putting it into the butter cake category where butter, flour, and sugar are used in equal amounts (by weight), liquid makes up about 2/3 and eggs about 1/3. The ratio for a basic butter cake looks like this: 3:butter 3:flour 3:sugar 2:liquid 1:eggs (plus leavening and flavoring). The tweaking of these ratios would be largely dependent on the form of liquid, or moisture used. In a typical carrot cake recipe, some of the moisture comes from the grated carrots as they cook in the batter. Not wanting the coarseness of grated carrots, I tested a recipe using carrot puree, but I didn't like the diluted flavor of the precooked carrots. Freshly extracted carrot juice provided the bright color and flavor that I was after.

After adjusting the ratios to produce a soft, moist cake, I examined the flavor. I dropped the amount of spices (cinnamon, nutmeg, ginger) so that they were a mere whisper in the background. I replaced some of the sugar with brown sugar, then Muscavado (Muscavado has a purer flavor because the molasses isn't removed in processing as it is in brown sugar) in an effort to deepen the flavor. Overall, I was satisfied with the cake, but something kept nagging at me. It was the deep, buttery, caramelized flavor of a fine dark rum that my brain kept referencing. I wished that I could've added caramel without seriously affecting the texture. Then I remembered a 'trick' I used with creme brulee, where the sugar was cooked to a deep amber, allowed to harden, then ground to a fine powder. I simply replaced the sugar in the recipe with this pre-caramelized sugar and I had a superlative cake that I could be proud of, not only because I was confident that it would please a discriminating palate, but also because it was uniquely my own and it pleased me. 

I left that restaurant shortly afterwards and never did get any feedback on the carrot cake. Years later, I read an article in a food magazine that asked international chefs for their favorite American foods. A certain world-renowned French pastry chef was among those interviewed. I think I remember his list containing chocolate chip cookies and key lime pie, but I will never forget that on that list, in black and white, was carrot cake.

Download recipe:   Carrot Cake

crispy asparagus

If food is a form of art [and by definition, I believe it is]— it's an exceptional one. Food has the distinction of engaging ALL of the senses. In food there is beauty, taste, aroma, texture, and sound. 

The most beautiful sound that food makes is 'crispy'. Crispy and crunchy are often used interchangeably, but there is a difference. Crispy is when a dry food meets the teeth, it offers little resistance and shatters into a brittle cadenza, while crunchy implies a thicker, denser product with a deeper resonance. 

Crispy is a lilting violin; crunchy is a rotund cello. 

crispy asparagus   rose yogurt

I've been chasing the elusive crispy, trying to coax it from vegetables. Oh, I know there are ways...

The makers of snack foods know its addictive powers. They have the technical and practical knowledge to achieve it, but their processes and equipment are not available to the average cook.

Of course, there is always deep frying, which is 'dry boiling' in fat at an accelerated temperature that dehydrates, browns, and ultimately crisps. While I love the texture, flavor, and aromas that hot fat lends to food, it wasn't what I was after.

I was chasing the type of crispy that comes from lyophilization, or freeze drying, a process that draws moisture from materials by converting the water in its cells to a solid frozen state, bypassing the liquid phase, to produce a product that is visibly unaltered and intact. Without access to this sexy beast of technology, I had to achieve the fragile crispness with only the tools available in my kitchen.

I knew the key was dehydration. In its pursuit, I moved thin shavings of asparagus from the low temperatures of a dehydrator to the higher temperatures of an oven, to no avail. In both cases, the drawing of moisture collapsed and compacted the cells, resulting in a product that I can only obliquely refer to as crisp. They had the right 'snap', but that was followed by an unpleasant papery chew.

Going back to square one, I restarted the process with shaved asparagus, but this time I attempted to soften the cell walls in heavily salted (1 1/2 Tblsps per quart) boiling water. Next, I spread them out on parchment and (oven) dehydrated at 150F for 30 minutes. Analyzing the shriveled, dry asparagus at this point, I wished for a fast, hot,and dry heat source to expand and puff the collapsed cells. A veil lifted, and 30 seconds later, the most underutilized and misunderstood appliance in my kitchen showed me some of its hidden potential.

Thank you microwave oven.  

p.s. Crispy asparagus taste suspiciously like pistachios.

p.p.s. Beware— they are just as addictive. 

asparagus rose

prosciutto  asparagus  olive oil  lemon  rose

I once worked for a chef with an exacting standard for detail. His mirepoix were perfectly uniform 1/4" dice and his mise en place were works of art, craft, and geometry. Besides his knives, which he wielded with the precision of a surgeon, his favorite tool was a ruler.

I learned a lot about OCD from him.

He must have seen some of those same tendencies in me because I was given some of the fussier tasks that he normally did himself. When he wasn't there to walk me through it, he would leave detailed notes-- complete with drawings-- of components or new dishes that he wanted me to work on. Eventually, as I became more familiar with his aesthetic, and he with mine, I was just given a list of dishes and left to interpret them.

On one of those lists was a dish that I fixated on: Fresh pea risotto with prosciutto rose. I immediately saw the dish in my head; a pale green mound of risotto topped with a loosely coiled ribbon of prosciutto. I couldn't figure out how prosciutto rose even fit into his style so I proceeded with my vision.

When I showed him the dish, he glowered at it. He insisted he had specified prosciutto lardons. I showed him the list and he conceeded that it had been his mistake but he never did explain how someone confuses lardons with roses.

In the end, he liked the dish as I had made it. My reward for pleasing him was to make 150 more just like it.

asparagus risotto

robiola bosina

prosciutto rose

deep-fried rose petals

asparagus salt  

A recent job took place on a privately-owned modern villa here in Northwestern Connecticut. Hidden behind 8'-high stone walls was the most extraordinary vegetable garden that brought to mind the gardens of Monticello, Versailles, and Villa Borghese. 

Highly ornamental, yet fully functional, it featured symmetrical parterres edged with clipped boxwood in elaborately knotted patterns; the pockets planted with herbs and vegetables. Red and green lettuces were planted in alternating blocks to form edible checkerboards. Iron trellage towers supported beans and tomatoes. Antique terra cotta cloches protected tender seedlings. Gurgling fountains, imposing sculptures-- there was so much to admire and draw inspiration from that I quickly went into sensory overload. 

In that formal setting, herbs and vegetables were treated and displayed with a deference that is usually reserved for ornamental plants and flowers. One stunning border featured roses interplanted with asparagus. The slim stalks of asparagus rising out of the ground echoed the thorny stems of the roses tipped with tight green buds. The gardener revealed that there was a beneficial logic to the pairing, but I was too distracted to take note.  

                                                           

I can however tell you about the logic of pairing the flavor of roses with asparagus. They are united by several aroma compounds, most notably alcohols and aldehydes and also some ketones and esters. Among them are:

Valeraldehyde (warm, winey, slightly fruity, and nutty)

Phenylacetaldehyde (earthy-sweet, fruity, floral)

Octanol (fresh orange-rose, slightly herbaceous)

Vinylphenol (vanilla extract)

Nonyl Alcohol (floral-citrus, slightly fatty, bitter)

No matter how much research I do on these compounds, the scientific names always shock me. They serve as a reminder that everything we perceive as wholesome, natural, and organic is, in fact, a complex composition of chemicals.

rhubarb fennel spruce tempura

rhubarb and fennel tempura

humboldt fog ripened goat cheese

rhubarb fennel spruce consomme

 

While considering other worthwhile applications for flavored beer/soda outside of the beverage realm, tempura batter became glaringly obvious. 

Tempura batter is all about texture. It should be light and shatteringly crisp. The best way that I know to achieve this is with a dry mix that consists of 1 part baking powder (10g), 1.5 parts cornstarch (15g), and 10 parts flour (100g) mixed with 20 parts (200g) carbonated water.

The carbonated water, which can be club soda, seltzer, or even beer, is mixed in at the last minute for three reasons: 

1- The carbonation (carbon dioxide) bubbles inflates the batter but dissipates quickly.

2- Liquid activates the alkaline and acid in the baking powder to produce carbon dioxide gas that further lightens the batter. Part of the reaction takes place upon mixing and part is activated by applying heat.

3- The batter should be cooked before the flour granules fully absorb water molecules (gelation), which would inhibit crispness.

For these reasons, tempura batter should be mixed just before dipping and frying to produce optimum crispness. Keeping a dry mix on hand and being familiar with the proper viscosity of the batter makes it practically effortless to mix a fresh batch for each order.

Tempura was introduced to Japan by the Portuguese and adapted from the Portuguese "tempero", meaning "to season". Contrarily, tempura batter is typically neutral in flavor. Using spruce beer in place of the carbonated water was an opportunity to introduce flavor into the batter. The spruce flavor was not as pronounced as I had hoped-- starches have a tendency to mute flavor-- but it did push through and produced a more dimensional tempura.

I was curious if the yeast in the spruce beer would have an effect on the batter. Logically, it shouldn't--yeast is slow to activate-- but there was something irresistibly brittle about this batch of tempura that warrants further exploration. 

This also got me thinking about all of the commercially available sodas that could be used to flavor tempura. 

Limonetto/shrimp... Orange Slice/carrot... Dr Pepper/duck... Root beer/Vidalia onion... anyone?   

cultured butter

Last fall, I enjoyed a memorable meal at Eleven Madison Park. I would be hard pressed to tell you what I had for breakfast, but I can remember every last detail of that meal, right down to the butter. In part, that may have been because the server made a ceremony of presenting it and pointing out that it was unsalted butter from Vermont. I can't deny that it was good. In fact, it was very, very good. But I would have been more impressed if it had been made in-house.

I distinctly remember wondering, as I ate the olive-studded baguette spread with the very, very good butter, why restaurants aren't making their own butter for table service. It seems a missed opportunity for customization and bragging rights. 

Is it cost, time, labor, skill? The cost is on or below par to an artisanal butter and the time and labor are negligible. Making butter is such a basic skill that a five-year-old can produce an excellent product from fresh cream, a jar, and some elbow grease. Anyone who has ever over-whipped cream (raising hand) has unwittingly made butter. What is often viewed as a disaster is, in fact, a small, everyday  miracle. 

Butter is essentially the fat of the milk. It is an water-in-oil emulsion, composed of 80-82 percent milk fat, 16-17 percent water, and 1-2 percent milk solids. Transforming milk into butter will take place faster and the the yield will be higher if you start with fresh, pasteurized (preferably raw, but not ultra pasteurized) heavy cream. Agitation, whether in a jar (15 minutes of constant shaking), or in a food processor (30-60 seconds), incorporates air, forms bubbles, then fat globules collect in the bubble walls. At this point, whipped cream--a light, stable foam-- is formed. If agitation continues, the friction warms and softens the fat globules to a near-liquid state, causing the walls to rupture and the fat globules to cling together, forming larger and larger masses. Knowing this is not necessary to make butter--the miracle will still happen.

After churning, the buttermilk is drained off. This buttermilk is the real deal--light, tangy, refreshing--and to some, the reward of churning your own butter. Ice water is then added to the fat crystals and they are worked together with a paddle or spatula until they are creamy and homogenized. 

Making butter is rewarding to those of us who are thrilled by watching matter transform from one state to another, but anyone would be won over by the flavor of freshly-formed, sweet butter. In her new book "Milk: The Surprising Story of Milk Through The Ages", culinary historian Anne Mendelson describes the taste of homemade butter as " the taste of cream to the nth power, cream newly translated to some rarefied spiritual afterlife."  Chemically, the flavor of butter is comprised of over 120 different aroma compounds that include: fatty acids, lactones, methyl ketones, diacetyl, and dimethyl sulfide.

Aside from the inherent flavors in butter, fat has long been recognized as a flavor carrier; a vehicle to deliver whatever flavors and aromas that are put in contact with it. This is why butter is wrapped and isolated in its own compartment in storage. But this capacity to absorb can be seen as an opportunity to infuse flavor. Truffles are often buried in porous foods such as rice or eggs to infuse them with their aroma--why not store them with butter? Or other aromatics: citrus, herbs, porcini, cheese, coffee, chocolate, vanilla beans? Can garlic butter be made more efficiently by storing cut garlic cloves in a closed container with butter? Similarly, a compound butter is made by blending a flavorful or aromatic ingredient into finished butter, but this can sometimes interrupt the texture. What if flavor was introduced into the cream before churning it into butter? The infusion would have to take place at a temperature below pasteurization (185F/85C in the US) or through cold vacuum infusion. One final interesting developement with fat is that it is being studied as the sixth taste, although the actual receptors are still undiscovered. 

I've made butter many times (some times, on purpose), but this is my first attempt at cultured butter, which is simply cream that has been soured (with buttermilk) and allowed to ferment or "ripen" at room temperature prior to ageing in the refrigerator. As with all fermentation, bacterial action develops acids and aroma compounds. One in particular, diacetyl, when superimposed with the compounds already present in fresh butter creates a noticeably fuller flavor that carries over into the buttermilk, which is the thickest, richest, and most flavorful that I have ever tasted. If you can resist drinking it all or turning it into amazing biscuits, it can be frozen to ripen the next batch of cultured butter.

ripening & ageing

churning

washing & creaming

Recipe:  Cultured butter

umami burger

Wait, wait, don't go...you're at the right place. Really, you are.

I know...I'm giving you a burger. But it's a special burger. Let me tell you why.

First, this is no fast food burger. It's about as slow as it gets. The hangar steak for the burger was marinated for 12 hours, then dry-aged for 3 days. The shittake buns needed to rise (twice) before being baked into soft pillows. The tomatoes were slowly roasted in a low oven to concentrate their flavor, then reduced to a paste on top of the stove. The onions were slowly caramelized, then dried until crisp in a slow oven. Even the cheese was transformed.

But the whole point of this burger is flavor. The kind of synergistic deliciousness that comes from the layering of glutamate-rich foods that produce the taste of umami. 

Umami--the fifth taste--is a chemical reaction that takes place on our taste receptors to produce a pleasant savory taste. As far back as 1825, Brillat-Savarin described the taste of meat as "toothsome" which is similar to the Japanese interpretation of "deliciousness". Brillat-Savarin also sagely foretold that the "future of gastronomy belongs to chemistry". As it turns out, it was chemistry that led to our understanding of glutamates, a type of amino acid, and the discovery of the synergy that occurs when foods containing glutamates are combined, the resulting taste is increased and magnified exponentially. [Does that make umami a fractal taste?].

Recently, scientists have uncovered the way that glutamates activates the nerves on our tongues. Referred to as the "Venus flytrap" mechanism, "Glutamate lands on your tongue and nestles into a glutamate-shaped depression on an umami receptor. Upon contact, the receptor--an enormous, folded protein--changes shape and grasps the glutamate. That shape change also activates the neuron that tells your brain you are tasting umami. Inosinate(compound found in meat) and guanylate(compound found in mushrooms) can bind to a seperate part of the umami receptor. Once bound, they tighten the receptors grip on glutamate, increasing its ability to taste up to 15-fold before the receptor relaxes its grip."

To understand this principle, we have only to examine the intuitive use of umami in world cuisine and how it has led to the foods that we crave. In Italy there is the popular trio of bread, tomatoes and cheese that takes on many forms. In the US, we have the burger and fries--an umami symphony of beef, bread, cheese, tomato, and potato. Mexico has its tacos and wide use of cornmeal and black beans. England loves its fish & chips and Australia knows the secret of Vegemite. Every culture has its versions of charcuterie and fermented beverages. But it is perhaps Asia that has the most extensive and refined applications of umami with their use of fermented soy products, seaweed, cured fish, and mushrooms--all sources of highly-concentrated glutamates.

Interestingly, we have glutamate receptors in our stomachs as well as our mouths. When the receptors in the stomach are stimulated, they send a message to the brain, which then sends an order back to the stomach to start digesting. Latest studies show that glutamates may play an important role in our digestion of protein. Wouldn't it be nice if, for once, something that tastes good turned out to be not only good for us, but essential to our health?

.......................................................................

Umami Burger

The beef:

Beef is a glutamate goldmine, particularly when cured or aged. To that end, hangar steak was marinated in soy, fish sauce and dashi, then dry-aged and combined with fresh chuck eye steak.

Dashi--a simple broth of kombu and bonito--is loaded with umami. It contains 3700mg of glutamates per 100g.

Recipe: Umami burgers

The bread:

Breads are a good source of glutamates because of fermentation, a process that unbinds protein molecules and allows the release of bound-up glutamate.

Dried shittakes (used here) contain 1060mg of glutamate(guanylate) per 100g as opposed to fresh, which contain 71mg/100g. The dough also contains soy sauce and fermented black beans to produce an incredibly savory and fragrant bread with a soft texture attributed to the addition of milk and eggs.

recipe: Shittake hamburger rolls

The tomato:

Ripe tomatoes have 10 times more glutamates than unripe. Roasting tomatoes also concentrates the glutamates and deepens the flavor. Kecap manis (sweetened soy sauce) is added in the reduction stage to increase the umami and mimic the ripening.

Most of the umami in tomatoes is concentrated in the seeds and inner membranes, so be sure to leave them in when cooking and strain out later.

Recipe: Tomato kecap

The cheese:

Parmesan has the highest concentration of glutamates among cheese with 1680mg per 100g. As a general rule: the older and drier the cheese, the more umami. Because Parmesan is very dry, it doesn't make a good "melty" cheese--a requirement for a good burger--yet there had to be a way to make it work. Digging through online science journals, I hit on the secret to making processed cheese. It's as simple as using sodium citrate as an emulsifying salt. With just two ingredients--sake (for umami) and sodium citrate-- it became possible to turn dry and crumbly Parmesan into a soft and supple sheet.

Recipe:  Pliable parmesan

 

The potatoes:

Pre-cooking potatoes with dry heat is the best way to achieve a crackling-crisp crust with soft, fluffy innards and the microwave is much quicker than an oven.

Scoff if you want, but I make my fries at home in the microwave. On second thought, don't scoff until you try it.  The process is so simple and the results so satisfying that you'll wonder why you never did it this way before:

Recipe: Microwave fries

  

birch wintergreen black currant banana

wintergreen, black currant, and banana nougat with birch syrup glass

I finally received my package of birch syrup. It was a long wait as it had to come from Alaska. You would think that with all of the birch trees in the northeast, that someone around here would be producing it. If they are, they're keeping it for themselves...I can't blame them.

Like maple syrup, Birch syrup is made by concentrating and evaporating tree sap into a syrup. But that's where the similarity ends. It takes 100 gallons of birch sap to make 1 gallon of syrup. With maple syrup, its about 40:1. Birch syrup is less sweet than maple and is predominantly low-glycemic fructose as opposed to maple, which is mainly sucrose.

Birch syrup has a deep, spicy, woody flavor that is tinged with methyl salicylate.

Methyl salicylate is an ester commonly known as oil of wintergreen or betula oil. Esters are a class of aromatic organic compounds that are widely found in nature and are usually described as "fruity".  Esters follow a general formula (alcohol + carboxylic acid = ester), therefore (methyl alcohol + salicylic acid = methyl salicylate). Names of esters always end in -ate.

Methyl salicylate is found in high concentrations in the berries and leaves of wintergreen (Gaultheria) and birch (Betula)and in lesser degrees in black currants, cherries, tomatoes, licorice root, fig leaf, pansies and dianthus. It is the prominent flavor of root beer and birch beer.

The primary ester in banana is isoamyl acetate, but bananas also share other esters with black currants: ethyl caproate and ethyl benzoate, which is described as fruity, sweet, wintergreen.