Baking Powder Substitute:
For 1 teaspoon baking powder, substitute 1/2 teaspoon cream of tartar plus 1/4 teaspoon baking soda.
Healthy Baking Powder Substitute:
For 1 teaspoon baking powder, substitute 1 teaspoon sodium-free or reduced-sodium baking powder.
More About Baking Powder
Because recipes often call for such small amounts of baking powder and baking soda, you may think these ingredients are not essential for success. They are! These ingredients are leavening agents -- without them, the baked products will not rise. And because the chemical properties of the two ingredients are different, they are not fully interchangeable.