n. A term used to indicate the amount of alcohol in liquor or other spirits. In the United States, proof is exactly twice the percentage of alcohol. Therefore, a bottle of liquor labeled "86 Proof" contains 43 percent alcohol. proof v.To dissolve yeast in a warm liquid (sometimes with a small amount of sugar) and set it aside in a warm place for 5 to 10 minutes until it swells and becomes bubbly. This technique proves that the yeast is alive and active and therefore capable of leavening a bread or other baked good.
From The Food Lover's Companion, Fourth edition by Sharon Tyler Herbst and Ron Herbst. Copyright © 2007, 2001, 1995, 1990 by Barron's Educational Series, Inc.
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