What is the difference between baking soda and baking powder?
Baking soda is pure sodium bicarbonate that needs an acid to make gas, while baking powder already contains its own acid and only needs moisture and heat.
Why it works
Both make carbon dioxide gas bubbles that lift batter. Baking soda reacts as soon as it meets an acid like buttermilk, yogurt, or brown sugar, so you bake right away. Baking powder is baking soda plus a dry acid, and double-acting types release gas twice, once when wet and again in the oven heat. Soda is about three to four times stronger.
How to do it
Common mistakes
- Swapping them one for one, which changes the rise and taste.
- Using old, expired leaveners, which no longer make enough gas.
- Adding too much baking soda, which leaves a metallic or soapy taste.
Questions about leavening
Can I substitute baking powder for baking soda?
Use about three times as much baking powder as the soda called for. The flavor and browning will change a little.
How do I test if baking powder is fresh?
Stir a teaspoon into hot water. It should fizz strongly right away.
Why do some recipes use both?
Soda neutralizes acid and browns the bake, while powder adds extra lift. Both work together.
Flour
Yogurt
Sugar
