- No clean 1:1 swap exists. In a pinch: 3 tsp baking powder per 1 tsp baking soda (King Arthur Baking)Expect different texture, more leavening aftertaste, and reduced browning. Works only if the recipe already contains an acid (buttermilk, cocoa, brown sugar, lemon juice). Baking soda is cheap, lasts indefinitely sealed, and has no perfect substitute — buying more is the real fix.
Baking soda substitutes
Tested swaps for baking soda, with ratios and sources.
Measure substitutes by weight where you can. The Baking soda converter gives the grams.
Note: our substitutions are direct, not chained — we don't recommend substituting a substitute.