If you don’t do a lot of baking, baking powder and baking soda might seem essentially interchangeable to you. In fact, while ...

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.

Self-raising flour will not keep for very long. The baking powder absorbs moisture from the air, which reacts with other ingredients in the flour, affecting its ability to rise. Self-raising flour ...