Baking Soda

Sit down with baking soda for a minute, because everybody thinks they understand it and almost nobody does. Drop it into something sour — kefir, sour cream, lemon juice — and it comes alive right away, hissing and bubbling up the side of the bowl. That bubbling is what lifts your dough. Mix it into something without any sourness and the bowl stays quiet, no hiss, no foam, and whatever you bake tends to come out flat.

Choosing it is simple: fresh soda is bone-dry, fine, almost silky between your fingers, no lumps, no sour or ammonia-like smell. If it smells of anything or has clumped, don't toss it on sight — drop a pinch in vinegar. A confident, eager fizz means it's still good.

Some people say more soda means more rise. No! Once you pass a certain point, the extra doesn't do you any favors — you taste it, a harsh, chemical aftertaste, with a yellowish crumb and a soapy edge that won't wash off your tongue. That's the mistake: cooks dump in extra soda hoping for height, and end up with pancakes that taste like the box the soda came from. Measure it against your acid, not against your hopes.