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'Perfect' Boiled Egg Formula Myth Debunked

by Thilaka Ravi on April 9, 2013 at 7:33 AM
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'Perfect' Boiled Egg Formula Myth Debunked

While chefs and diners at chic restaurants mull over the '65-degree egg' and its '6X degree C' counterparts, an expert has claimed that the supposed science behind the perfect boiled egg is flawed.

It all boils down to the need for greater society-wide understanding of basic scientific concepts, Cesar Vega, Ph.D, said at the 245th National Meeting and Exposition of the American Chemical Society, the world's largest scientific society.

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Vega has a Ph.D. in food science, culinary training from Le Cordon Bleu, and is a research manager at Mars Botanical, a division of Mars, Incorporated.

Heating an egg may seem like the simplest form of cooking, next to boiling water. But the best way of doing so remains a surprisingly contentious issue among great chefs, Vega pointed out.
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Eggs are a gastronomic enigma because the ovotransferrin and ovalbumin proteins in the white begin to coagulate or solidify at around 142 and 184 degrees Fahrenheit, respectively.

The phosvitins and other egg yolk proteins, however, can start thickening even at temperatures as low as 130 degrees F. So what's the right temperature for the perfect egg?

Vega explained that some professional cooks have taken a relatively new approach by cooking eggs in temperature-controlled water circulators. Using these devices, chefs cook eggs at relatively low temperatures (such as 60 degrees C, or 140 degrees F), for relatively long periods of time (at least 1 hour). And what Vega terms the "6X degree C egg" is now ubiquitous on menus in chic restaurants.

The "X" varies depending on the cook, but usually is from 0 to 5, such as the "65 degree C egg." But chefs claim that temperature alone translates into the perfectly cooked egg, and cooking time - one hour or three hours - does not matter.

"The idea that cooking time does not matter is nonsense," Vega said, citing research he did and published in the peer-reviewed journal Food Biophysics that debunked the idea.

It carefully documented that the texture of a cooked egg yolk depends on both temperature and time. The study gives chefs precise numbers of the time and temperature combinations needed to cook eggs to whatever firmness they want.

Eggs certainly are not the only entry on the menu of scientific misconceptions in the kitchen.

Vega pointed out that research published last year challenged time-honored ideas about the browning of sugar, known as caramelization. Everyone thought that sugar had to first melt before undergoing that mouth-watering transformation into caramel. The new research showed, however, that sugar could caramelize when heated while it's still solid.

"It's dismaying to think that so many could be so wrong for so long about what actually happens to such basic ingredients like sugar or eggs during cooking," Vega said.

"But it also provides a rare opportunity to rethink the possibilities of the basic, and to communicate accurate information and the fun and excitement of science to the public," he added.

Source: ANI
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