Out of Baking Powder? Make This Simple Substitute

Out of baking powder? Mix baking soda with cream of tartar to make a quick substitute for the amount your recipe needs. This small, single-use blend starts reacting as soon as it gets wet, so stir it into the dry ingredients and get the batter or dough into the oven promptly.

Ingredients

1/4 teaspoon baking soda (about 1.2 g)
1/2 teaspoon cream of tartar (about 1.5 g)

This quantity replaces 1 teaspoon of baking powder in a recipe. It makes about 3/4 teaspoon of mixed substitute, but that smaller volume is the right chemical proportion; do not add extra just to make the measurement fill a teaspoon. For a recipe calling for more, multiply both ingredients by the same amount. For example, to replace 1 tablespoon of baking powder, use 3/4 teaspoon baking soda and 1 1/2 teaspoons cream of tartar.

Instructions

Check the recipe before mixing. Confirm how much baking powder it calls for and check that baking soda and cream of tartar are suitable additions. This substitute works best in recipes that can be mixed and baked right away, such as pancakes, biscuits, muffins, quick breads, and many cakes. If the recipe already includes baking soda, do not automatically add more; account for the existing amount so the total does not become excessive.
Measure the ingredients accurately. For each 1 teaspoon of baking powder needed, measure 1/4 teaspoon baking soda and 1/2 teaspoon cream of tartar. Use level measuring spoons rather than estimating by eye. Baking soda is concentrated, and too much can leave a salty, alkaline, or soapy taste and cause a baked item to rise rapidly and then collapse.
Combine the powders thoroughly. In a small, completely dry bowl, stir the baking soda and cream of tartar together until evenly distributed. If making a larger quantity, whisk them together or pass them through a fine sieve so there are no concentrated pockets of either ingredient. Keep the mixture dry until it goes into the recipe.
Add it where the baking powder belongs. Tip the mixture into the recipe’s dry ingredients and whisk or sift them together. Continue with the recipe as written, combining wet and dry ingredients only when you are ready to cook or bake. Do not stir the substitute into a cup of liquid and leave it standing; the acid and baking soda start producing carbon dioxide as soon as they become wet.
Bake or cook without delay. Once the wet and dry ingredients are combined, move the batter or dough into the oven or onto the cooking surface promptly. A homemade cream-of-tartar blend acts as a single-acting leavener, so much of its lift begins during mixing. Follow the original recipe’s temperature and doneness cues; the substitute does not require a different oven temperature.

Tips

Use the ratio, not equal spoonfuls. For every 1 teaspoon of baking powder, the formula is 1/4 teaspoon baking soda plus 1/2 teaspoon cream of tartar. Baking powder already contains both an alkaline ingredient and one or more acids, so adding a teaspoon of baking soda alone is not an equivalent swap. When scaling, keep the ratio consistent: 2 teaspoons of baking powder call for 1/2 teaspoon soda and 1 teaspoon cream of tartar.
Be mindful of ingredients already in the recipe. Baking soda needs acid to react. A recipe with buttermilk, yogurt, sour cream, molasses, or another acidic ingredient may already have a specific balance of soda and acid. If it calls for baking powder as well, replacing that powder with the cream-of-tartar blend can work, but adding extra soda beyond the stated ratio may upset the flavor and rise. Do not remove the recipe’s other leaveners.
Work quickly after adding liquid. Unlike many commercial double-acting baking powders, this blend does not provide a second, dependable lift in the oven. Measure the dry mix first, preheat the oven if the recipe requires it, and prepare the pan before combining wet and dry ingredients. Waiting on the counter can let gas escape before the batter is baking.
Check the freshness of your ingredients. Old baking soda or cream of tartar that has absorbed moisture or odors may not perform as expected. Keep both in tightly closed containers, use clean, dry measuring spoons, and replace ingredients that smell unusual, are damp, or have formed hard clumps. A failed rise is difficult to fix once the batter is mixed.

Serving Suggestions

This is a baking ingredient, not a finished dish, so use the substitute in a recipe that already calls for baking powder rather than serving it on its own. It is a practical option for a small batch of pancakes, muffins, biscuits, scones, or a quick bread when you discover the missing leavener midway through measuring. For pancakes, portion the batter onto a hot griddle soon after mixing; for biscuits or scones, shape and bake promptly so the initial lift is not lost.

Use it most confidently in recipes with a modest amount of baking powder and a batter or dough that goes straight into the oven or pan. It can be less predictable in delicate cakes or recipes that depend on a long rest, a very open crumb, or the extended action of double-acting baking powder. In those cases, using a recipe designed for the ingredients you have is a better choice than trying to force a substitution.

Variations

Make a larger amount for a recipe: Multiply both ingredients evenly. To replace 2 teaspoons of baking powder, combine 1/2 teaspoon baking soda with 1 teaspoon cream of tartar. To replace 1 tablespoon, combine 3/4 teaspoon soda with 1 1/2 teaspoons cream of tartar. Mix the amount you need just before baking rather than preparing a jar in advance.

If you do not have cream of tartar: There is no equally convenient dry substitute using baking soda alone. Some recipes can use baking soda with an acidic liquid, such as lemon juice or vinegar, but that adds liquid and changes the recipe’s acidity. It is not a direct swap: the other liquids may need adjustment, and the added acid can affect taste and texture. Use an alternative only when the recipe itself supports it, rather than adding acid to an unfamiliar batter by guesswork.

If you have self-rising flour: It can sometimes replace the flour and leavener together in a recipe, but it is not a one-for-one substitute for baking powder. Self-rising flour contains a leavener and salt, and its proportions vary by product. Only use it when you can adjust the flour and salt amounts sensibly or when you have a recipe written for it.

If a recipe already uses baking soda and an acid: It may not need baking powder in the same way as a recipe that relies on powder alone. However, removing the powder can still change the rise and texture. Avoid doubling the baking soda as a shortcut; excess soda can affect both flavor and browning. Choose a recipe formulated for your available leaveners if you are unsure.

Storage and Reheating

For the most dependable rise, mix this substitute immediately before you need it. The dry ingredients can be stored separately in their original, tightly sealed containers in a cool, dry cupboard, but the combined soda-and-cream-of-tartar mixture is best treated as a fresh, single-use blend. Once combined, moisture from the air can start the reaction and reduce its effectiveness. If you have already mixed more than the recipe needs, discard the extra rather than relying on it for another bake.

The substitute itself does not need refrigeration and is not reheated. Store the baked food according to its ingredients and recipe: keep items with perishable fillings or toppings refrigerated within 2 hours, and use most cooked leftovers within 3–4 days in the refrigerator. Reheat leftovers until they reach 165°F (74°C). Plain baked goods may have different storage directions depending on their texture and ingredients, so follow the recipe’s guidance and freeze extras when appropriate.

Frequently Asked Questions

How much homemade substitute replaces 1 teaspoon of baking powder?

Use 1/4 teaspoon baking soda and 1/2 teaspoon cream of tartar. Together they measure about 3/4 teaspoon, but they replace 1 teaspoon of baking powder by proportion and leavening action. Do not add extra baking soda to bring the volume up to a full teaspoon; that can leave an unpleasant taste and alter the rise.

Can I use baking soda by itself?

Not as a direct replacement. Baking soda needs an acid to produce the gas that lifts batter, while baking powder contains an acid component as well as baking soda. If the recipe already includes enough acidic ingredients, a carefully adjusted soda-only approach may work in some cases, but it changes the recipe’s balance. The cream-of-tartar formula is a more straightforward swap when you have both ingredients.

Can I mix the substitute into the wet ingredients first?

It is better to combine it with the dry ingredients. The reaction starts when baking soda and cream of tartar get wet, and leaving the mixture in liquid before the rest of the batter is ready can waste some of its lifting power. Measure the dry ingredients in advance, combine them with the wet ingredients when ready, and bake promptly.

Will this work in every cake or bread recipe?

No substitute behaves exactly like every brand or type of commercial baking powder. This blend gives a useful single-acting reaction, but double-acting baking powder can release gas during mixing and again with heat. The swap is most reliable in quick recipes that are baked right away; delicate cakes, long-rest batters, and recipes with unusual leavening balances may turn out differently.

Can I prepare a jar of this substitute and keep it in the pantry?

For best results, make only the amount needed for one bake. The combined powders can pick up moisture, and their reaction may begin before they reach the batter if they are stored in humid conditions or in a container that is not completely dry. Keep baking soda and cream of tartar sealed separately, then measure and mix them when you are ready to use them.

Can I use lemon juice or vinegar instead of cream of tartar?

Those acidic liquids can react with baking soda, but they are not a direct replacement for cream of tartar because they add liquid to the recipe. That extra liquid and acidity can change the batter’s texture and flavor. Use lemon juice or vinegar only in a recipe that provides a suitable adjustment or specifically calls for it; otherwise, choose a different recipe or obtain cream of tartar.

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