With the UK experiencing a flour shortage, it’s time we got to grips with what exactly we’re using. For self-raising flour, it’s easy: it’s just plain flour with a raising agent added.

To make plain flour into self-raising flour, simply add 2tsp of baking powder per 150g of plain flour. Baking powder, which comprises bicarbonate of soda and cream of tartar, creates carbon dioxide when it comes into contact with liquids, giving cakes their rise.

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