You can make your own baking powder by combining 15ml/1tbsp bicarbonate of soda with 30ml/2tbsp cream of tartar. Measure carefully as too much or too little can upset a recipe’s balance.
4. Can baking soda replace baking powder in recipes? In some cases, baking soda can be used as a substitute for baking powder by combining it with an acidic ingredient like cream of tartar.