What is the difference between baking soda and baking powder?

Baking & Technique class-q-and-abaking-fundamentals

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What is the difference between baking soda and baking powder?

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Baking soda is sodium bicarbonate. Baking powder contains baking soda plus an acid and starch. They are not the same ingredient, so do not substitute them in equal amounts.

The course distinguishes the moisture and heat reactions of double-acting baking powder. Follow the tested recipe’s specified leavener and method rather than changing only the spoonfuls.

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