Replace baking powder with baking soda and cream of tartar.
Baking powder is baking soda plus an acid, so recreating it needs one-quarter the soda with half again as much cream of tartar. Running out of baking powder is common, and this substitution keeps batters rising when the two components are on hand.
Baking Powder Substitute
Soda = powder x 0.25; cream of tartar = powder x 0.5
Soda = powder x 0.25; cream of tartar = powder x 0.5 Baking powder is baking soda plus an acid, so recreating it needs one-quarter the soda with half again as much cream of tartar.
Running out of baking powder is common, and this substitution keeps batters rising when the two components are on hand.
This calculator takes 1 input: Baking powder needed. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.