what substitute for… · baking
What can I substitute for baking powder?
For 1 tsp baking powder, use 1/4 tsp baking soda + 1/2 tsp cream of tartar + 1/4 tsp cornstarch. Or 1/4 tsp baking soda + 1/2 cup buttermilk (replace 1/2 cup liquid).
The full answer
Why baking powder needs substituting
Baking powder is a pre-mixed leavener: baking soda (alkaline) + cream of tartar (acid) + cornstarch (anti-caking). When wet, the acid and base react to release CO2, lifting batter. When you run out mid-bake, you can rebuild the chemistry from individual pantry ingredients — the trick is matching both alkaline + acid in the right ratio.
The canonical substitutes (ranked by reliability)
- Baking soda + cream of tartar (closest match)
- Baking soda + acidic liquid
- Baking soda + lemon juice or vinegar
- Self-rising flour swap (if you have self-rising flour)
Substitutes that DO NOT work
- Baking soda alone (without added acid) — produces soapy, bitter taste from unreacted soda
- Yeast — leavens differently (CO2 + alcohol over hours, not minutes); changes texture entirely
- Whipped egg whites — adds lift but no chemical leavening; only works in recipes designed for it (souffles, sponge cakes)
- Club soda or sparkling water — CO2 escapes before structure sets; only works in light batters (tempura, some pancakes)
The chemistry math (why 1:2:1 works)
Commercial double-acting baking powder is ~28% baking soda + ~28% cream of tartar (sodium acid pyrophosphate or monocalcium phosphate in cheaper brands) + ~44% cornstarch (filler + moisture absorber). For 1 tsp baking powder (~4g), that's ~1.1g soda + ~1.1g acid + ~1.8g cornstarch. The 1/4 tsp soda + 1/2 tsp cream of tartar ratio matches that chemistry.
Cross-reference: see /pages/what-substitute-for/baking-soda for the inverse problem (out of soda, have powder) + /pages/what-substitute-for/cream-of-tartar for cream-of-tartar substitutes specifically.
Time ranges by condition
| Condition | Duration | Note |
|---|---|---|
| 1 tsp baking powder needed (pantry has soda + cream of tartar) | 30 seconds to measure | 1/4 tsp soda + 1/2 tsp cream of tartar + 1/4 tsp cornstarch |
| 1 tsp baking powder needed (recipe uses buttermilk/yogurt) | 30 seconds | 1/4 tsp baking soda; replace 1/2 cup liquid with buttermilk |
| 1 tsp baking powder needed (only vinegar/lemon) | 30 seconds | 1/4 tsp baking soda + 1/2 tsp vinegar or lemon juice; bake immediately |
What changes the time
- Acid available. Cream of tartar = closest texture; buttermilk = best flavor; vinegar = slight aftertaste in plain batters
- Recipe type. Quick breads/muffins tolerate substitutes well; delicate cakes (angel food, chiffon) need real powder
- Double-acting matters. Real powder reacts twice (wet + heat); substitutes react once (wet only) — bake immediately, do not let batter rest
- Salt content. Cream of tartar substitute has no salt; some buttermilk subs add saltiness — reduce added salt by 1/4 tsp
Common questions
Can I use just baking soda instead of baking powder?
No — not without adding acid. Baking soda alone leaves a soapy, bitter taste because the unreacted alkali sits in the finished bake. You MUST pair soda with acid (cream of tartar, buttermilk, lemon juice, vinegar, sour milk) for the leavening reaction to complete. For 1 tsp baking powder: use 1/4 tsp baking soda + a matching acid source.
How long does the soda + cream of tartar mix last once mixed?
If you keep the dry mix sealed and dry, it lasts indefinitely — same as commercial baking powder. Once it hits any moisture (humidity in the air over weeks, or wet batter), the reaction starts and it loses potency. Best practice: mix only what you need for the current recipe, and bake immediately after combining with wet ingredients.
Will my baked goods taste different with a substitute?
Slight differences are normal. Cream-of-tartar substitute = closest to real powder, almost no flavor change. Buttermilk substitute = mildly tangy, often improves flavor in pancakes/muffins. Vinegar substitute = trace acidic note that disappears in chocolate, cinnamon, or spice-heavy bakes but can show up in plain vanilla cake. Lemon-juice substitute = pleasant in citrus or vanilla; clashes with chocolate.
Sources
We cite primary research, expert practice, and authoritative reference. Higher-tier sources weighted heavier. See methodology.
- T2King Arthur Baking — baking powder substitutes — Authoritative published substitution guide with tested ratios
- T2Harold McGee, "On Food and Cooking" — Chemistry of chemical leaveners (pp. 532-535 in 2004 edition)
- T2Cook's Illustrated leavener guide — Side-by-side substitution tests across 6 baked-good categories
- T2America's Test Kitchen, "The Science of Good Cooking" — Why baking powder works + when substitutes fail
Cite this page
de Vries, P. (2026). What can I substitute for baking powder?. AskedWell. Retrieved 2026-05-21, from https://askedwell.com/pages/what-substitute-for/baking-powder
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