Substitute for Baking Powder
Use 1/4 teaspoon baking soda for every 1 teaspoon of baking powder, then add an acid to activate it. Cream of tartar is the cleanest option: use 1/2 teaspoon per 1/4 teaspoon baking soda. Lemon juice or buttermilk work too, but they add liquid to the batter, so you may need to reduce another liquid slightly.
Best Baking Powder Substitutes
- 1/4 tsp baking soda + 1/2 tsp cream of tartar
- 1/4 tsp baking soda + 1/2 tsp lemon juice
- 1/4 tsp baking soda + 1/2 cup buttermilk
Baking powder creates lift and rise in baked goods. These combinations react to produce the same leavening effect.
Why it works
Baking powder is just baking soda pre-mixed with a dry acid. When you add your own acid, the baking soda reacts and produces CO2 bubbles, which is what makes baked goods rise. Cream of tartar is ideal because it's dry and doesn't change the flavor or add moisture. Lemon juice works the same way chemically but adds a small amount of liquid that can throw off the balance.
Common mistakes
- Using baking soda straight without adding an acid. The recipe won't rise and the baking soda leaves a soapy taste.
- Using too much baking soda to overcompensate. More baking soda doesn't mean more rise and it tastes metallic.
- Adding lemon juice without adjusting the other liquids, which makes the batter too wet.
Real examples
- Pancakes and you're out of baking powder: baking soda plus a small splash of lemon juice gives you the lift, and the lemon flavor is barely noticeable.
- Cake batter: cream of tartar is the cleanest substitute here since it won't mess with the texture or taste.