Baking Soda and Cream of Tartar (Best Option)
1/4 teaspoon baking soda + 1/2 teaspoon cream of tartar per 3/4 teaspoon baking powderBaking powder is essentially a combination of baking soda and an acid, usually cream of tartar. When combined, they produce carbon dioxide gas that helps the dessert rise and maintain a light texture. Using these two separately allows precise control over the leavening process.
For best results, mix the baking soda and cream of tartar thoroughly into the dry ingredients to ensure even leavening. Avoid adding extra acidic ingredients as it may cause over-leavening.
This substitute closely mimics the original baking powder’s effect, preserving the delicate crumb and mouthfeel characteristic of tiramisu without introducing unwanted flavors.