Another option for substituting baking powder is to use natural yogurt or buttermilk. These ingredients contain acid, which helps react with the baking soda and creates a similar effect to baking powder. It's like a little trick up our sleeves, using ingredients we already have in the fridge to make our baked goods rise.
For example, if a recipe calls for 1 teaspoon of baking powder, we can use 1/2 cup of natural yogurt or buttermilk instead. It's like a little swap, using one ingredient for another, and it works like a charm. Just remember to reduce the amount of liquid in the recipe, as the yogurt or buttermilk adds moisture to the batter.
Royal baking powder – Artofit