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baking powder definition

☆ baking powder

a leavening agent that raises dough by the gas (carbon dioxide) produced when baking soda and acid react in the presence of water: it usually contains baking soda mixed with either starch or flour and cream of tartar or another acid-forming substance, as anhydrous sodium aluminum sulfate

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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