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Sauces curdle while cooking because of chemistry, not Biology. While it looks disgusting, a sauce that has curdled during cooking isn't spoiled and won't make you sick.

Robert L. Wolke, in his article on making a successful bechamel or mornay sauce, said:

"Now what if, because of a few moments of diverted attention, say, to answer the telephone, you return to face disaster: a stringy, watery sauce? No guarantees, but there may be a way out. A technique attributed to the late culinary dean of American cookery James Beard is to briskly whisk in a little lemon juice. It can be expected to work because protein molecules need low acidity and calcium ions -- positively charged calcium atoms -- in order to aggregate into their tangled networks. The lemon juice's citric acid interferes with this aggregation in two ways: It increases the acidity and it ties up (chelates) the calcium ions."

"Curdle Hurdles," Robert L. Wolke, The Washington Post; Wednesday, Oct 13, 2004; Page F01

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โˆ™ 2009-11-04 06:22:22
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