Substitute for Baking Powder: Make a Reliable 1:1 Mix

This baking powder substitute combines baking soda, cream of tartar, and a little cornstarch to make a quick-rising leavener for cakes, muffins, pancakes, and similar bakes. Mix it just before using, then measure it by volume in place of baking powder; the acid and baking soda start working as soon as they meet moisture.

Ingredients

This small batch makes 1 tablespoon (15 ml) of substitute, enough to replace 1 tablespoon of baking powder. The quantities below are measured by volume; gram weights are approximate because brands and how ingredients settle can affect a small spoonful.

¾ teaspoon baking soda (about 3.5 g)
1½ teaspoons cream of tartar (about 4.5 g)
¾ teaspoon cornstarch (about 2 g)

Cream of tartar supplies the acid that reacts with baking soda to produce carbon dioxide, the gas that helps batter rise. Cornstarch is included mainly to bring the mixture to the same volume as the baking powder it replaces and to help keep the dry ingredients free-flowing. It is not essential to the leavening reaction, but including it makes the one-for-one measurement especially convenient.

Instructions

Measure the ingredients carefully. Use level measuring spoons, not heaped kitchen spoons. Baking soda is much more concentrated than baking powder, so an extra pinch can affect both the rise and flavor. If a recipe calls for more than 1 tablespoon of baking powder, multiply each ingredient by the same amount; for example, double the quantities here to replace 2 tablespoons.
Combine the dry ingredients. Put the baking soda, cream of tartar, and cornstarch in a small, completely dry bowl. Stir with a dry fork or small whisk for about 30 seconds, scraping the bottom and sides so no pocket of baking soda remains. A small fine-mesh sieve can be used instead if the cream of tartar is lumpy.
Use the mixture right away. Measure the amount of substitute your recipe needs, level the spoon, and add it where the recipe calls for baking powder. Follow the recipe’s directions about mixing the dry ingredients and wet ingredients; do not add extra liquid or acid just because this substitute contains cream of tartar.
Move efficiently once it is mixed into batter. Cream of tartar reacts with baking soda when liquid is present, so the mixture begins producing gas after it is hydrated. Get the batter into the oven, onto the griddle, or into the appropriate cooking vessel promptly rather than letting it stand on the counter for a long time.
Check the result in context. The substitute works best in recipes with a short mixing-to-cooking interval. Follow the original recipe’s oven temperature and doneness cues, since baking time depends on the particular batter, pan, and oven. This leavener does not require a separate resting or cooking step before it goes into the recipe.

Tips

Keep the one-for-one ratio straight. Use 1 tablespoon of this finished mixture for every 1 tablespoon of baking powder listed. If you need only 1 teaspoon of baking powder, use 1 teaspoon of the finished mixture, not a teaspoon of baking soda. Baking soda by itself needs an appropriate acid in the batter and is not a direct substitute.
Measure baking soda precisely. Too much can leave a bitter, salty, or soapy taste and may cause a quick rise followed by sinking. Level the measuring spoon and avoid estimating by eye, especially when making a small batch.
Use dry tools and bowls. Moisture can start the acid-base reaction before the substitute reaches the batter. Make sure the bowl, sieve, and spoon are dry, and do not scoop with a wet measuring spoon.
Remember that this is a fast-acting blend. Many commercial baking powders are double-acting: they release some gas when wet and more when heated. This homemade version reacts promptly once liquid is added, so it may give less lift if a batter sits for an extended time. Mix and bake in a timely way, and do not expect it to behave exactly like every commercial brand.

Serving Suggestions

This is a baking ingredient rather than a finished dish, so use it in recipes that call for baking powder and serve the finished food as directed. It is a practical option for a small batch of pancakes, biscuits, quick bread, muffins, or a simple cake when the baking powder tin is empty. For example, if a muffin recipe calls for 2 teaspoons of baking powder, measure 2 teaspoons of this blend and continue with the recipe as written.

For griddle batters such as pancakes, have the pan ready before combining wet and dry ingredients so the batter can be cooked soon after mixing. For biscuits or scones, follow the recipe’s handling instructions and avoid repeatedly working the dough; overmixing can make the baked texture dense regardless of which leavener is used. In cakes and muffins, distribute the dry ingredients evenly before adding liquid, which helps avoid concentrated pockets of leavener and uneven rising.

Variations

Make it without cornstarch. Combine ¼ teaspoon baking soda (about 1.2 g) with ½ teaspoon cream of tartar (about 1.5 g) for each 1 teaspoon of baking powder needed. That blend measures about ¾ teaspoon, rather than a full teaspoon, but it can still be used as the replacement amount. The cornstarch in the main recipe is a neutral filler, not the ingredient that creates lift.

Scale up for a larger recipe. For every tablespoon of baking powder required, use ¾ teaspoon baking soda, 1½ teaspoons cream of tartar, and ¾ teaspoon cornstarch. Multiply all three quantities evenly. Making only what you need is often the simplest approach, but a larger batch can be prepared if the utensils and storage container are completely dry.

Use another acid only as part of a recipe adjustment. Some cooks use baking soda with buttermilk, yogurt, lemon juice, or vinegar instead of baking powder. These are not automatic one-for-one swaps: the recipe needs enough acid to react with the soda, and adding extra acidic liquid can change the batter’s flavor, moisture, and browning. Choose a recipe written for that combination or adjust its other liquids and ingredients deliberately rather than adding an acid to this blend.

Skip the cornstarch if it is unsuitable. The small quantity here is primarily for volume and moisture management. You can leave it out and measure the resulting soda-and-cream-of-tartar blend by the ratio given above. If avoiding cornstarch because of an ingredient restriction, check the labels on all packaged ingredients and use a suitable starch only if you need the finished blend to measure one-for-one.

Storage and Reheating

For the most dependable lift, mix this substitute immediately before you need it. If you have unused dry mixture, transfer it to a clean, dry, airtight container, label it with the ingredients and date, and keep it in a cool, dry cupboard. Use it within 1 month for best results, and discard it sooner if it becomes damp, clumpy, or smells unusual. Do not put a wet spoon into the container or store it near steam from a kettle or stovetop.

This is a dry leavener, not a prepared food, so refrigeration and reheating do not apply. The baking soda and cream of tartar also have their own package dates and storage directions; an old or moisture-exposed ingredient can weaken the mixture. If the substitute has been stored and you are unsure whether it will still raise a delicate bake, making a fresh batch is a better choice than relying on it. Once mixed into batter, follow the recipe’s timing and cooking instructions rather than saving the batter for later.

Frequently Asked Questions

How much substitute replaces 1 teaspoon of baking powder?
Measure 1 teaspoon of the finished mixture for 1 teaspoon of baking powder. If making only that small amount, combine ¼ teaspoon baking soda with ½ teaspoon cream of tartar and ¼ teaspoon cornstarch. The cornstarch brings the volume to 1 teaspoon; without it, the soda-and-cream-of-tartar portion measures about ¾ teaspoon.

Can I use baking soda alone instead?
Not as a direct replacement. Baking soda needs an acid to react and create the gas that raises a bake. Without enough acid in the recipe, it may not leaven properly and can leave an unpleasant alkaline taste. The cream of tartar in this formula supplies that acid, which is why the ingredients are combined in a measured ratio.

Will this work in every recipe that calls for baking powder?
It can replace baking powder by volume in many quick-baking recipes, including pancakes, muffins, and quick breads, but it may not produce identical results in every formula. Commercial baking powders can be double-acting, while this mixture reacts promptly once wet. Recipes that need a long rest, a particularly delicate rise, or a specific commercial leavener may turn out differently.

Can I prepare a jar of it in advance?
Yes, provided all ingredients and equipment are dry, but a fresh small batch is the most reliable option. Store any advance mixture airtight in a cool, dry place and use it within 1 month for best results. Moisture can trigger a reaction early, so discard a batch that has become damp or clumped rather than trying to dry it out.

What if I do not have cream of tartar?
There is no universal dry substitute that keeps the same ratio and works in every recipe. Baking soda paired with buttermilk, yogurt, lemon juice, or vinegar can work when the recipe is designed or adjusted for that acid, but each changes the liquid balance and sometimes the flavor. If the recipe cannot be adjusted, it is safer to use a different recipe or obtain baking powder than to add baking soda alone.

Does the cornstarch make the substitute rise?
No. The lift comes from the reaction between baking soda and cream of tartar. Cornstarch acts as a dry filler so the finished blend measures like baking powder and can help keep the powders free-flowing. It is optional for the chemical reaction, but omitting it means you should use the smaller soda-and-cream-of-tartar ratio rather than assuming the blend has the same volume.

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