The Short Answer: Not Always, and It Depends on What Else Is in the Recipe
Baking soda and baking powder are not interchangeable in most recipes, even though both make baked goods rise. The difference matters because baking soda needs an acid to work — something like buttermilk, lemon juice, or brown sugar — while baking powder already contains acid mixed in. If your recipe has no acid, baking soda alone will not rise properly. If your recipe calls for baking soda and you use only baking powder, your baked good may taste metallic or bitter.
The safest approach is to use what the recipe calls for. But if you have only one on hand, you can make a substitution work if you understand what each one does and what your recipe contains.
Key Takeaways
- Baking soda requires an acidic ingredient in the recipe to create lift; baking powder contains its own acid and works without one.
- If a recipe calls for baking soda and you use baking powder instead, you may end up with a metallic taste and less rise.
- If a recipe calls for baking powder and you use only baking soda, the baked good will not rise at all unless the recipe already contains acid.
- You can replace baking soda with baking powder if you use three times the amount, but the result may taste slightly different.
- You can replace baking powder with baking soda only if the recipe already contains acidic ingredients like buttermilk, yogurt, or vinegar.
When You Can Use Baking Powder Instead of Baking Soda
This substitution works only if the recipe has no acidic ingredients. Check the ingredient list for buttermilk, yogurt, sour cream, lemon juice, vinegar, molasses, or brown sugar. If none of these are present, you can use baking powder as a replacement.
Use three times as much baking powder as the recipe calls for in baking soda. If the recipe asks for 1 teaspoon of baking soda, use 3 teaspoons (1 tablespoon) of baking powder. This works because baking powder is only about one-third active ingredient; the rest is starch and acid that have already been mixed in.
The result will be slightly different in taste and texture. Baking powder can leave a faint metallic or chalky aftertaste, especially in recipes where baking soda would have been the dominant leavening agent. The rise may also be less dramatic. But the baked good will still work.
When You Can Use Baking Soda Instead of Baking Powder
This substitution is trickier because baking soda needs acid to set up. Look at the recipe ingredients first. If it contains buttermilk, yogurt, sour cream, brown sugar, molasses, lemon juice, vinegar, or cocoa powder, the acid is already there and baking soda will work.
Use one-third the amount of baking soda that the recipe calls for in baking powder. If the recipe asks for 1 teaspoon of baking powder, use about one-third teaspoon of baking soda. You may also need to add a small amount of acid — roughly 1/4 teaspoon of lemon juice or vinegar per 1/2 teaspoon of baking soda — if the recipe does not contain enough acid on its own.
This substitution works best in recipes where acid is already a major ingredient, like buttermilk pancakes or chocolate cake. It is riskier in recipes where baking powder is the only leavening agent and no acid is listed.
Why the Two Are Not the Same
Baking soda is pure sodium bicarbonate. It reacts when ready when it touches an acid, creating carbon dioxide bubbles that make batter rise. It works fast, so batters with baking soda should go into the oven right away. Once the acid and baking soda meet, the reaction is over within minutes.
Baking powder is baking soda plus an acid (usually cream of tartar) plus a starch filler. Single-acting baking powder reacts when it gets wet. Double-acting baking powder reacts twice — once when wet and again when heated — which is why it is more common in home baking. Baking powder works more slowly and more predictably than baking soda alone.
Because baking powder contains acid already built in, it does not need an acidic ingredient in the recipe to work. Because baking soda does, recipes that use it must include something sour.
What Happens If You Use the Wrong One
If a recipe calls for baking soda and you use baking powder instead, the baked good will usually still rise, but it may taste metallic or slightly bitter. This is because baking powder contains more acid than the recipe was designed to balance. The texture may also be slightly different — sometimes denser, sometimes with a different crumb structure. The taste issue is usually mild in recipes with strong flavors like chocolate or spice, but noticeable in delicate recipes like vanilla cake or sugar cookies.
If a recipe calls for baking powder and you use only baking soda, the baked good will not rise at all unless the recipe already contains acid. You will end up with a flat, dense result. This is the more serious mistake because there is no rise to salvage.
Recipes Where Substitution Is Easiest
Chocolate cakes, brownies, and spice cakes are forgiving because their strong flavors mask any metallic taste from baking powder. Recipes with buttermilk, yogurt, or sour cream are also flexible because the acid is already there, making baking soda work well even if the recipe originally called for baking powder.
Recipes where substitution is hardest are those with delicate flavors — vanilla cakes, sugar cookies, and plain muffins — and those where baking powder is the only leavening agent with no acidic ingredients listed. In these cases, using the wrong one will noticeably change the taste or texture.
A Quick Reference Table
| Recipe Calls For | You Have | What to Do | Will It Work? |
|---|---|---|---|
| Baking soda | Baking powder | Use 3 times the amount | Yes, but may taste slightly metallic |
| Baking powder | Baking soda | Use 1/3 the amount; recipe must contain acid | Only if recipe has buttermilk, yogurt, or vinegar |
| Baking soda | Nothing | Do not bake; get baking soda first | No |
| Baking powder | Nothing | Do not bake; get baking powder first | No |
Frequently Asked Questions
Can I use baking soda in a recipe that calls for baking powder if there is no acid in the recipe?
No. Baking soda needs acid to work, and if the recipe has none, the baking soda will not set up and your baked good will not rise. Check the ingredient list for buttermilk, yogurt, sour cream, lemon juice, or vinegar first. If none are there, use baking powder as the recipe says.
What if I use too much baking powder?
Too much baking powder causes over-rising followed by collapse. Your baked good may rise high in the oven, then sink in the middle as it cools. It can also taste bitter or metallic. Stick to the amount the recipe calls for.
Does baking soda expire?
Baking soda lasts for years if kept dry and sealed. Baking powder expires faster — usually within 6 months to a year — because the acid inside slowly reacts with the baking soda over time. You can test baking powder by mixing a small amount with water; if it fizzes, it still works.
Can I make my own baking powder at home?
Yes. Mix 1 part baking soda with 2 parts cream of tartar, plus 1 part cornstarch to keep it dry. This makes single-acting baking powder. Store it in an airtight container. This works in a pinch, but commercial baking powder is more reliable because it is formulated for consistent rise.
Why do some recipes call for both baking soda and baking powder?
Recipes use both when they need the baking soda to react with acid (for flavor and when ready rise) and the baking powder to provide additional rise during baking. This combination gives more control over when and how much the batter rises.