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Food & Think

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Off the Road

The travel adventures of a nomad on the cheap


November 12, 2010

Soufflés: The Original Molecular Gastronomy?

Since my wedding earlier this year, I have made it a personal goal to use all of the kitchen tools I received as gifts. Some, like the glass nesting bowls and the microplane zester, got a good workout from the get-go. Others, namely the ramekins and the soufflé dish, have so far languished in the cupboard looking like a stunted Doric column and its babies. Last week I resolved to rectify the situation—I attempted my first soufflé.

My earliest exposure to soufflés was as a child watching television sitcoms, where a slammed door or other loud noise would cause it to deflate instantly. They looked like more trouble than they were worth, especially since they appeared to be nothing but an edible balloon.

I finally understood the soufflé’s appeal when, as a teen or young adult, I tasted a chocolate one at a restaurant. It was a textural marvel, combining the fluffiness of a meringue on the inside with the chewy crust of the best brownies on top.

Apple-cheddar soufflé. Photograph by Lisa Bramen

For my own experiment, I decided to try a semi-savory version, using an apple-cheddar soufflé recipe from Mollie Katzen’s The Enchanted Broccoli Forest. It came out fine, I think, though it didn’t seem to puff up as much as I expected. It tasted pretty good, but it lacked the “triumphant height” Alice Waters refers to in The Art of Simple Food.

There are a number of things that may have gone wrong, and they all have to do with the unique physical and chemical properties of eggs. In fact, it occurred to me that soufflés and meringues may be the original molecular gastronomy. Although the inventors of these dishes are unknown, it seems unlikely that they hit upon the recipes entirely by accident. Someone had to have been curious about what would happen if you beat an egg yolk for a really long time—mon Dieu, it turns into a thick foam!—mixed it with other ingredients and then baked it.

As for the science, Cooking for Geeks by Jeff Potter explains the chemistry of egg whites:

Since regions of the proteins that make up egg whites are hydrophobic—literally, water-fearing—they normally curl up and form tight little balls to avoid interacting with the water. But when whisked, those regions of the proteins are slammed against air bubbles and unfold, and as more and more proteins are knocked against an air bubble, they form a layer around the bubble and essentially trap it in the liquid, creating a foam that’s stable.

Potter and Waters both say a copper bowl is best for whisking whites, because trace amounts of copper ions interact with the protein in the egg whites and make a more stable foam that is easier to work with. Potter also suggests whisking by hand because, he says, “electric beaters won’t work in as much air before the foam is set.” I used my stand mixer, another cherished gift, so maybe that was part of the problem.

The enemy of a stable egg-white foam is oil—either from traces left in the bowl or little bits of egg yolk—because it interacts with the hydrophobic sections of the proteins and interferes with their trapping of the air bubbles.

Another hint that some cookbooks don’t bother to mention is that egg whites will expand more quickly and easily if allowed to reach room temperature than when straight out of the refrigerator. I learned this the hard way, I’m embarrassed to admit, when I attempted the delicious-sounding chocolate malt ball cake from Baked: New Frontiers in Baking, by Matt Lewis and Renato Poliafito, for my mother-in-law’s birthday. The cold egg whites never formed a stiff foam but, impatient person that I am, I used them anyway instead of starting over. The frosting they were used in was a gloppy mess.

The final variable that may have factored into my soufflé’s low profile was oven temperature; the appliances that came with my kitchen are charmingly retro but not necessarily reliable. In On Food and Cooking: the Science and Lore of the Kitchen, Harold McGee informs that the higher the temperature of the oven, the higher the soufflé will rise, because the heat expansion will be greater and more of the moisture in the mix will be vaporized. However, he points out, this also means the soufflé will fall more quickly once it’s taken out of the oven.

Another nugget McGee explains makes me wonder if my soufflé came out the way it was supposed to after all: A thick soufflé mix can’t rise as easily as a thin mix. Since the recipe included grated apples, it may have just been too heavy to rise very high. Who knows, but I’ll keep trying other soufflé recipes.

Ramekins, you’re next.



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3 Comments »

  1. [...] This post was mentioned on Twitter by Amanda Bensen, SmithsonianRSS and Milwaukee MollyCools, Beth Ludwick. Beth Ludwick said: Soufflés: The Original Molecular Gastronomy?: Since my wedding earlier this year, I have made … http://bit.ly/chmKt4 via @foodandthink [...]

  2. WilliamB says:

    I have a number of cookbooks that mention that cold eggs are easier to separate but room temp (officially defined as about 60F because the term originated before central heating) eggs are easier to work with.

    There is some dissention about whether enough ions transfer to to the eggs to make copper truly a better bowl. Using a pinch of cream of tartar definitely has that effect. OTOH I strongly recommend that one *not* use a plastic bowl because it’s so hard to get oil out of plastic.

    I wonder about Potter’s statement about whipping by hand. I have read several recommendations that when using a mixer on egg white to start on slow speed for the first few minutes, and to watch carefully toward the end because it’s possible to overbeat.

    Next up – meringue or baked alaska?

  3. meander says:

    Perhaps hand-whipped egg whites will lead to better results, but I’ve never had a problem when using a stand mixer (e.g., my “Tale of Morel-ity“, a wild mushroom souffle). Perhaps your whites weren’t whipped long enough? Or too long? (I vaguely recall that overwhipping can reduce the stability.)

    Herve This’s “Molecular Gastronomy”, a series of short essays on various food science topics has a chapter on souffles with suggestions for better souffles. One thing he suggests is to put a heat source under the souffles — for example, preheat a baking stone on the bottom rack of the oven and then bake your souffles on a rack the next slot above the baking stone. Another of his ideas is to “seal the surface in order to prevent the release of bubbles formed inside…[one way to do this] would be to place the souffle under a broiler before putting it in the oven.” I always have baking stones in my oven, so I get the underneath source of heat but haven’t tried the sealing method. Maybe next time…

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