baking powder

American  

noun

1. any of various powders used as a substitute for yeast in baking, composed of sodium bicarbonate mixed with an acid substance, as cream of tartar, capable of setting carbon dioxide free when the mixture is moistened, causing the dough to rise.

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baking powder British  

noun

1. any of various powdered mixtures that contain sodium bicarbonate, starch (usually flour), and one or more slightly acidic compounds, such as cream of tartar: used in baking as a substitute for yeast

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baking powder Scientific  

/ bā′kĭng /

1. A mixture of baking soda, a nonreactive filler (such as starch), and at least one slightly acidic compound (such as cream of tartar). Baking powder works as a leavening agent in baking by releasing carbon dioxide when mixed with a liquid, such as milk or water.

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Etymology

Origin of baking powder

First recorded in 1840–50

Example Sentences

See Examples For:

baking powder

Social media, he told the courtroom, was like the baking powder that makes a cake rise, exacerbating the struggles of already vulnerable teens.

From The Wall Street Journal ● Mar. 28, 2026

Whisk the flour, curry powder, baking soda, baking powder, and MSG, if using, together in a medium bowl.

From Salon ● Dec. 13, 2025

If the tech industry were a bakery, dysprosium would be like baking powder: It is used in small quantities but essential for enabling electric-car motors, wind turbines, military systems and computer-chip machinery.

From The Wall Street Journal ● Oct. 11, 2025

For gluten-free: Use 2 cups GF baking blend and 1 cup whole GF flour of choice, like sorghum flour, plus 1 tsp baking powder.

From Salon ● Apr. 25, 2025

I added the sugar, flour, baking powder, and salt to the mixer and turned it on.

From "From the Desk of Zoe Washington" by Janae Marks