How do I make 1 teaspoon of baking powder?

Chef's answer
To make baking powder, combine half a teaspoon of cream of tartar and a quarter teaspoon of bicarbonate of soda. This provides the equivalent of one teaspoon of baking powder. To make self-raising flour add one teaspoon of baking powder (or equivalent homemade) to 110g plain flour..
Frequently asked Questions 🎓
To substitute for 1 fresh stalk, use either 1 dried stalk, 1 teaspoon of Sereh powder, or a strip of lemon zest.
To make baking powder, combine half a teaspoon of cream of tartar and a quarter teaspoon of bicarbonate of soda. This provides the equivalent of one teaspoon of baking powder. To make self-raising flour add one teaspoon of baking powder (or equivalent homemade) to 110g plain flour..
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