The most reliable substitute is baking soda plus an acid

Baking powder is a mixture of baking soda, an acid (usually cream of tartar), and a filler. If you have baking soda at home, you can recreate baking powder by combining it with an acid. For every teaspoon of baking powder your recipe calls for, use 1/4 teaspoon of baking soda plus 1/2 teaspoon of an acid like lemon juice, vinegar, or cream of tartar.

This substitution works because the acid reacts with the baking soda to produce carbon dioxide gas, which makes your baked goods rise. The reaction happens when ready when wet ingredients are added, so mix your dry ingredients and wet ingredients separately, then combine them right before baking. Do not let the batter sit—the lift will escape.

If your recipe already contains acidic ingredients like buttermilk, yogurt, or sour cream, you can use baking soda alone without adding extra acid. Use 1/4 teaspoon of baking soda for every teaspoon of baking powder the recipe calls for. The acid in the wet ingredients will do the work.

Key Takeaways

  • Mix 1/4 teaspoon baking soda with 1/2 teaspoon lemon juice or vinegar to replace one teaspoon of baking powder.
  • If your recipe contains buttermilk, yogurt, or sour cream, use baking soda alone at 1/4 teaspoon per teaspoon of baking powder.
  • Combine wet and dry ingredients right before baking when using baking soda substitutes, because the rise happens when ready.
  • Whipped egg whites can add lift to cakes and cookies when baking powder is unavailable, though the texture will be lighter and more delicate.

Using vinegar or lemon juice as the acid

White vinegar and lemon juice are the most common acids to pair with baking soda. Both are acidic enough to trigger the reaction and both are likely already in your kitchen. Use white vinegar or distilled vinegar—avoid apple cider vinegar or wine vinegar, which have stronger flavors that can affect taste.

For lemon juice, use fresh juice or bottled lemon juice. The amount of acid matters: too little and your baked goods will not rise enough; too much and you will taste the acid. Stick to the 1/4 teaspoon baking soda to 1/2 teaspoon acid ratio. If you are doubling a recipe, double both measurements.

This method works well for quick breads, pancakes, waffles, and cakes. It is less reliable for cookies, which need a slower rise and benefit from baking powder's double-acting nature (it releases gas twice—once when wet, once when heated). Cookies made with baking soda alone may spread too much before they set.

Using cream of tartar for a closer match

Cream of tartar is the acid already present in commercial baking powder. If you have it on hand, mixing it with baking soda gives you the closest substitute to actual baking powder. Use 1/4 teaspoon baking soda plus 1/2 teaspoon cream of tartar per teaspoon of baking powder.

Cream of tartar is less common in home kitchens than vinegar or lemon juice, but it is worth buying if you bake regularly. It has no flavor, so it will not change the taste of your baked goods. It also stores longer than vinegar or lemon juice without losing potency.

Whipped egg whites for cakes and soufflés

Whipped egg whites create lift through air incorporation rather than chemical reaction. This method works best for sponge cakes, angel food cakes, and soufflés—recipes that already rely on eggs for structure. Whip egg whites until stiff peaks form, then fold them gently into your batter at the end.

The texture will be lighter and more delicate than a cake made with baking powder, and the crumb will be more tender. This method does not work for cookies, brownies, or dense cakes that need the sustained lift baking powder provides. It also requires more time and technique than other substitutes.

What not to use as a substitute

Baking soda alone, without an acid, will not work unless your recipe contains acidic ingredients. Using baking soda alone in a neutral recipe will leave a soapy taste and the baked goods will not rise properly. Self-rising flour is not a substitute—it already contains baking powder and salt, so using it changes the salt content of your recipe.

Yeast is not a substitute for baking powder. Yeast requires time to ferment and produces a different texture and flavor. Yeast is used for bread, while baking powder is used for quick breads and cakes. Cornstarch, flour, and other starches do not create lift and will not replace baking powder.

Adjusting recipes when substituting

When you use baking soda with an acid instead of baking powder, the chemical reaction happens faster. This means your batter will start to rise as soon as the wet and dry ingredients mix. Get your pans ready and your oven preheated before you combine the ingredients, and transfer the batter to the oven within a few minutes.

If your recipe calls for baking powder and also contains acidic ingredients like buttermilk or brown sugar, you may need less of your substitute. Start with the standard ratio (1/4 teaspoon baking soda per teaspoon of baking powder) and adjust based on how your baked goods turn out. If they do not rise enough, add a little more baking soda next time. If they taste soapy or metallic, you used too much.

Temperature and altitude also affect how baking soda works. At high altitudes, baking soda can cause over-rising and collapse. If you live above 3,000 feet, reduce the baking soda by 25 percent and increase the oven temperature by 15 to 25 degrees Fahrenheit.

Frequently Asked Questions

Can I use baking soda without any acid?

Only if your recipe already contains acidic ingredients like buttermilk, yogurt, sour cream, lemon juice, or vinegar. If your recipe is neutral (using milk, water, or oil), baking soda alone will not work and will leave a soapy taste. Always pair baking soda with an acid unless the recipe provides one.

How much baking soda do I use if I do not have cream of tartar or vinegar?

You can use lemon juice, buttermilk, yogurt, or sour cream as the acid. If your recipe already contains one of these, use 1/4 teaspoon baking soda per teaspoon of baking powder. If it does not, add 1/2 teaspoon of lemon juice or vinegar along with 1/4 teaspoon baking soda.

Will my baked goods taste different if I use a substitute?

If you use vinegar or lemon juice, the taste should be the same—the acid is neutralized during baking. Cream of tartar has no flavor. Whipped egg whites will change the texture to be lighter and airier, but not the flavor. Baking soda alone tastes soapy, so avoid using it without an acid.

Can I make a big batch of baking powder substitute and store it?

You can mix baking soda and cream of tartar ahead of time and store it in an airtight container for several months. Do not mix baking soda with vinegar or lemon juice ahead of time—the reaction will start when ready and the mixture will lose its lift. Mix those two right before baking.