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    Baking Soda/Baking Powder

    Source of Recipe

    I'm just about to start all of my holiday baking, and I'm wondering if my baking soda and baking powder from last year are still good. Can you help?
    A: Baking soda, or sodium bicarbonate, is a natural leavener made from a mineral called "toona." Baking soda does not deteriorate with age; however, to test its potency, add a few drops of lemon juice or vinegar to 1 teaspoon of baking soda--if it froths, it's good.

    Baking powder is also a leavener. It is usually a mixture of baking soda, cornstarch and cream of tartar. Baking powder does deteriorate with age and is susceptible to moisture, so always check the date on the bottom of the can and be sure to store it in a cool, dry place. When measuring baking powder, be sure to use a dry measuring spoon. To check the freshness of baking powder, mix 1 tablespoon into a little hot water--if it bubbles vigorously, it's good to use.




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