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Baking soda has one job: it reacts with acid to make bubbles, and as a bonus it raises the batter's pH so bakes brown deeper. That second job is why substitutes behave slightly differently even when the rise works.
Best for: Cakes, muffins, pancakes
Cut any added salt in half · baking powder already contains sodium.
Best for: Low-sodium baking · behaves almost identically
Add a pinch of salt to make up the flavor the sodium was providing.
Best for: Simple quick breads and biscuits
Omit the recipe's soda, powder, and salt.
Cookies are where the swap shows: baking soda drives spread and deep golden edges. Made with powder instead, the same cookie bakes puffier, cakier, and paler. And if the recipe has buttermilk, yogurt, or lots of brown sugar, the soda was neutralizing that acid · a powder-only version can taste faintly tangy.
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Yes, at three times the amount: 3 teaspoons of baking powder for every 1 teaspoon of baking soda. Expect a paler, slightly puffier result and reduce added salt, since baking powder brings its own sodium.
Dense, flat, pale results. In a pinch, one beaten egg white folded into the batter recovers some lift in pancakes and small bakes, but for cookies and cakes use the baking powder conversion instead.
Related guides: Baking Powder · Cream of Tartar · Buttermilk · All guides