Baking Soda and Cream of Tartar (Best Option)
1/4 teaspoon baking soda + 1/2 teaspoon cream of tartar per 1 teaspoon baking powderBaking powder is essentially a combination of baking soda (a base) and an acid (often cream of tartar). Using these two separately replicates the chemical reaction that produces carbon dioxide gas, which helps the cheesecake rise slightly and maintain a light texture. This is critical in cheesecakes where excessive rise or fall can affect texture.
To ensure success, mix the baking soda and cream of tartar thoroughly into the dry ingredients before combining with wet ingredients. Avoid overmixing the batter after adding these to prevent excess air incorporation, which can cause cracks.
Compared to commercial baking powder, this substitute provides a fresher, more controlled leavening effect, often resulting in a slightly more tender and evenly textured cheesecake without off-flavors.