Dreiling shared the key ingredients and their proportions, for making your own baking powder. That mixture, says Dreiling, is simply "1 part baking soda with 2 parts cream of tartar and 1 part ...

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.

If you have plain flour but no self-raising flour, you can make your own by adding 2 teaspoons of baking powder to every 150g plain flour. Sift it through to ensure the baking powder is evenly ...