Baking soda vs baking powder is one of the most common baking questions. Both make cakes, cookies and pancakes rise. However, they work in different ways, and using the wrong one can leave your bakes flat, bitter or strangely brown.
This guide explains the difference in simple terms, when to use each one, how to substitute them, and how to test if yours are still fresh.
Baking Soda vs Baking Powder: The Short Answer
- Baking soda is pure sodium bicarbonate. It needs an acid, such as buttermilk, yogurt, lemon juice or brown sugar, to work.
- Baking powder is baking soda already mixed with a dry acid. Therefore, it works with only liquid and heat.
- Baking soda is about 3–4 times stronger than baking powder.
How Baking Soda Works
When baking soda meets an acid and liquid, it releases carbon dioxide bubbles. As a result, the batter rises. Baking soda also helps browning, because it makes the dough more alkaline. That is why cookies with baking soda spread more and turn darker.
How Baking Powder Works
Most baking powder is “double-acting.” In other words, it releases some gas when it gets wet and more gas in the oven. This makes it reliable for cakes and pancakes, even when the batter waits a few minutes.
When to Use Baking Soda vs Baking Powder
- Use baking soda when the recipe has acidic ingredients, for example yogurt, buttermilk, brown sugar, honey or natural cocoa.
- Use baking powder when the recipe has no acid, such as plain milk cakes or sponge cakes.
- Use both when you want lift and browning; for instance, our fluffy pancakes recipe uses both.
How to Substitute One for the Other
- Instead of 1 teaspoon baking powder: use ¼ teaspoon baking soda plus ½ teaspoon cream of tartar.
- Instead of 1 teaspoon baking soda: use about 3 teaspoons baking powder. However, the taste and color may change.
How to Test Freshness
- Baking soda: add ¼ teaspoon to 1 tablespoon of vinegar. It should fizz strongly at once.
- Baking powder: add 1 teaspoon to hot water. It should bubble right away.
If there are few bubbles, replace it, because old leaveners make flat bakes.
Common Baking Soda vs Baking Powder Mistakes
Bitter or soapy taste
Cause: Typically, it is because there was too much baking soda, or not enough acid to neutralize it.
Fix: Measure with level spoons, and never add extra “for luck.”
Flat cakes
Cause: The leavener was old, or the batter waited too long before baking.
Fix: Test freshness, and bake soon after mixing.
Cookies that spread too much
Cause: Too much baking soda makes dough spread and brown faster.
Fix: Follow the recipe exactly. Our guide to cookies spreading too much explains more.
Storage Tips
Keep both in airtight containers in a cool, dry cupboard. Baking powder stays fresh for about 6–12 months after opening, while baking soda lasts longer.
Where It Comes From
Bakers used baking soda in the 1800s, and baking powder was developed soon after, making cakes much easier to bake at home. You can read more about baking powder on Wikipedia.
Baking Soda vs Baking Powder FAQ
Can I use baking powder in cookies?
Yes. However, cookies will be puffier and paler than with baking soda.
Is baking soda the same as bicarbonate of soda?
Yes. They are two names for the same ingredient.
Why do some recipes use both?
Baking soda neutralizes acids and adds browning, while baking powder adds extra lift.
Keep baking with us. If you found this guide to baking soda vs baking powder useful, you will find 31 more Eastern and Western desserts in our digital cookbook, each with exact measurements and clear steps.
