โญ Baking Soda and Cream of Tartar (Best Vegan Option)
1/4 teaspoon baking soda + 1/2 teaspoon cream of tartar per 1 teaspoon baking powderThis combination works because baking powder is essentially baking soda mixed with an acid, typically cream of tartar. When combined, they react immediately upon wetting, producing carbon dioxide bubbles that help the bread rise. In zucchini bread, this ensures a tender crumb and proper lift.
For best results, mix the baking soda and cream of tartar thoroughly before adding to the batter to ensure even leavening. Be careful not to increase the acid too much, as it can affect flavor.
Compared to commercial baking powder, this substitute provides a very similar rise and texture, preserving the moistness and lightness expected in zucchini bread without imparting off-flavors.