Substitute for baking-soda in biscuits
Quick answer
Baking powder is the most reliable swap — use 3 tsp of baking powder for every 1 tsp of baking soda the recipe calls for, and reduce any salt slightly. If your recipe includes buttermilk or another acid, this ratio gives biscuits comparable rise with minimal flavor change.
Some links below are affiliate links. As an Amazon Associate, AltPantry earns from qualifying purchases at no extra cost to you.
| Rank | Substitute | Ratio (replaces 1 cup baking-soda) | Notes |
|---|---|---|---|
| #1 | Baking powder | 3 tsp baking powder per 1 tsp baking soda | Baking powder contains its own acid (cream of tartar or sodium aluminum sulfate), so it generates CO2 without needing the buttermilk or sour cream already in most biscuit recipes. Rise and texture are very close to the original. Biscuits may taste very slightly more neutral since the acid-base reaction that baking soda produces is partially responsible for browning — expect a marginally paler crust. |
| #2 | Cream of tartar plus baking soda | 1/2 tsp cream of tartar + 1/4 tsp baking soda per 1 tsp baking soda called for (net replacement for 1 tsp baking soda) | This mimics the single-acting acid-base reaction of baking soda with an acid already in the recipe. Useful if you want to preserve the sharper leavening burst of baking soda without changing the dairy component. Works in a pinch but the margin for error is tighter — too much cream of tartar leaves a faint metallic aftertaste. |
| #3 | Self-rising flour | Replace all-purpose flour 1:1 with self-rising flour, then omit the baking soda and reduce any additional baking powder by the amount the recipe specifies | Self-rising flour already contains baking powder (roughly 1.5 tsp per cup) and salt, so it can replace the leavening system entirely if you adjust proportions carefully. Biscuit texture is close to standard, but because the baking powder in self-rising flour is double-acting and weaker per cup than a direct soda addition, you may get slightly less aggressive rise. King Arthur Baking and Southern baking tradition both treat this as a standard biscuit approach. |
Why biscuits is different
Biscuits rely on rapid, forceful leavening to push apart the butter layers before the fat melts completely — this is what creates flakiness. Baking soda works fast when it hits the acid in buttermilk or yogurt, generating CO2 almost immediately. That quick burst matters more in biscuits than in, say, muffins, because biscuit dough is handled minimally and baked at high heat (425–450°F). Any substitute that leavens more slowly or weakly will produce a denser, less layered result.
Common mistakes
The most common error is using a 1:1 swap of baking powder for baking soda — baking powder is roughly one-third the strength, so you need 3x the volume to match lift. A second frequent mistake is forgetting that baking powder contains salt; if you add the full amount without reducing salt elsewhere, biscuits come out noticeably over-salted. When using self-rising flour, people often forget to account for the baking powder already in the flour and add more on top, which produces a bitter, over-leavened result.
Baking soda in biscuits is not interchangeable with baking powder on a 1:1 basis — a mistake that consistently produces flat, dense results. The 3:1 swap (baking powder for baking soda) is the most tested, widely recommended ratio across major cooking authorities and holds up reliably across both buttermilk and cream-based biscuit recipes. If you have cream of tartar on hand, the cream of tartar plus baking soda combination is a more precise stand-in that preserves the fast-acting leavening burst, but it requires careful measuring.
If you bake biscuits often and run out of baking soda regularly, keeping self-rising flour as a pantry backup is worth considering — it effectively bakes in the leavening system and is the foundation of many traditional Southern biscuit recipes. Whichever substitute you use, cold butter, minimal mixing, and a fully preheated oven matter more than the exact leavening agent.
Frequently asked questions
- Can I just leave out the baking soda and rely on the baking powder already in the recipe?
- Only if the recipe calls for both. Most biscuit recipes that list both baking soda and baking powder need the soda to neutralize the acid in buttermilk and boost browning. Dropping it entirely will give you a paler, slightly denser biscuit — workable, but a step down in texture.
- Does substituting baking powder change the flavor of biscuits?
- Slightly. Baking soda reacts with acidic dairy to produce a mild tang and helps with Maillard browning. Baking powder doesn't drive that same reaction, so biscuits made with it as a replacement may taste a touch blander and brown a bit less on the bottom. The difference is minor in most recipes.
- My biscuits came out flat even after using 3 tsp of baking powder per tsp of baking soda — what went wrong?
- Most likely the butter was too warm before baking, the dough was overworked (which melts fat and collapses air pockets), or the baking powder was old. Test your baking powder by dropping 1 tsp into hot water — it should bubble vigorously. If it doesn't, replace it before baking.
← Back to all baking-soda substitutes