โญ Potassium Bicarbonate (Best Vegan Option)
1 teaspoon per 1 teaspoon of baking sodaPotassium bicarbonate acts chemically similar to baking soda by releasing carbon dioxide when reacting with acids, making it an effective leavening substitute. It is often used for low-sodium dietary needs.
Use a 1:1 ratio for substitution. Since it lacks sodium, it won't affect saltiness but will maintain the leavening properties necessary for the tiramisu's texture.
The final product will be nearly identical in texture and rise, with no notable flavor difference, making it a good alternative especially for sodium-restricted diets.