Best Baking Powder Substitutes (With Ratios)
The best baking powder substitute is homemade baking powder: mix 1/4 tsp baking soda with 1/2 tsp cream of tartar to replace each 1 tsp of baking powder. Because it starts reacting as soon as it's wet, bake the batter right away.
Baking powder substitutes and ratios
| Substitute | Amount per 1 tsp baking powder | Best for | Why it works |
|---|---|---|---|
| Baking soda + cream of tartar | 1/4 tsp soda + 1/2 tsp cream of tartar | Cakes, muffins, biscuits | The same base-plus-dry-acid recipe as commercial powder |
| Baking soda + buttermilk or yogurt | 1/4 tsp soda + 1/2 cup buttermilk; cut 1/2 cup other liquid | Pancakes, scones, quick breads | Lactic acid neutralizes the soda |
| Baking soda + lemon juice or vinegar | 1/4 tsp soda + 1 Tbsp acid; cut 1 Tbsp liquid | Cakes, muffins in a pinch | Citric or acetic acid neutralizes the soda |
| Baking soda + molasses | 1/4 tsp soda + 1/2 cup molasses; cut liquid and sugar | Gingerbread, spice cakes | Molasses is mildly acidic |
| Self-raising flour | Swap the flour; skip the baking powder and salt | Simple cakes, biscuits | About 1 1/2 tsp baking powder is built into each cup |
| Whipped egg whites | 2 whites, folded in | Pancakes, waffles, sponges | Trapped air expands in the oven |
How baking powder works
Baking powder is three things: baking soda (sodium bicarbonate, the base), one or two dry acids, and cornstarch to keep them dry. Add liquid and the acid and base react, releasing carbon dioxide gas that inflates bubbles in the batter.
Most store-bought powder is double-acting. One acid reacts at room temperature when wet; a second, slower acid waits for oven heat, roughly 60–70 °C / 140–160 °F, for a second burst of lift. Homemade powder made with cream of tartar is single-acting, so nearly all the gas comes out in the first few minutes.
Getting the ratio right matters. Too much soda without enough acid leaves a soapy, metallic taste and a yellowish, coarse crumb. Too little and the bake is flat and dense.
When not to swap
- Batters that rest. Overnight waffle batter, refrigerated cookie dough and make-ahead muffins need double-acting powder. A homemade swap will be spent before baking.
- Plain baking soda alone. Never use it 1:1. It's three to four times stronger and needs acid to work.
- Recipes with lots of baking powder, such as tall biscuits with 1 Tbsp or more. Large amounts of acid swap can affect flavour; the cream of tartar version is the cleanest.
- High-altitude baking. Gas expands more at lower air pressure, so cut leavening by about 15–25% with any swap.
Questions
Can I use baking soda instead of baking powder?
Only if you add an acid. Baking soda is about three to four times stronger, so use 1/4 tsp for every 1 tsp baking powder, plus cream of tartar, buttermilk, yogurt, lemon juice or vinegar.
How do I know if my baking powder is still good?
Stir 1/2 tsp into 1/4 cup hot water. If it fizzes vigorously right away, it's fine. Little or no bubbling means it's time to replace it.
Does homemade baking powder work the same as store-bought?
Mostly, but it's single-acting, releasing nearly all its gas as soon as it gets wet. Mix the batter quickly and get it into a preheated oven straight away.
Can I make baking powder without cream of tartar?
Yes. Use 1/4 tsp baking soda with an acidic liquid: 1/2 cup buttermilk or yogurt, or 1 Tbsp lemon juice or vinegar, and reduce the recipe's other liquid by the same amount.