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.

---

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

---

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.

---

Etymology

Origin of baking powder

First recorded in 1840–50

Example Sentences

Baking powder is which type of “agent” used by bakers that causes dough to expand by releasing carbon dioxide after being mixed with liquid or subjected to heat?

From Slate • Feb. 1, 2024

Baking powder has always struck me as quite magical.

From Salon • Sep. 27, 2021

Baking powder, baking soda, and apple cider vinegar join forces to make these pumpkin pancakes light and fluffy.

From Salon • Sep. 26, 2021

Baking powder was never used; it was alleged to contain a chemical harmful to the body.

From "Black Boy" by Richard Wright

Baking powder, a substitute for yeast, usually consisting of an acid, a carbonate, and a little farinaceous matter.

From Webster's Unabridged Dictionary (2nd 100 Pages) by Webster, Noah