Relying exclusively on one leavener ruins the structural balance of a scratch batter. Baking soda neutralizes acidity, but if you add too much, the batter loses its pleasant tang and develops a soapy, metallic aftertaste. Baking powder operates on a double-acting mechanism: it releases a modest wave of gas upon contact with liquid, followed by a secondary surge triggered by the thermal shock of the griddle.
A properly calibrated scratch pancake recipe pairs both leavening agents systematically. Baking soda neutralizes just enough of the buttermilk’s lactic acid to raise the batter's pH slightly above 6.0, which speeds up the Maillard browning reaction. The baking powder provides the sustained lift necessary to push the batter upward during the first two minutes of cooking. For two cups of all-purpose flour, combining 1 teaspoon of baking powder with 1/2 teaspoon of baking soda strikes the exact balance needed for maximum lift and clean flavor.
