Sometimes you’ll come across a recipe that calls for cake flour instead of all-purpose flour. I keep cake flour on hand for these types of cakes but if you don’t have it on hand or don’t want to run to the store, there’s an easy way to convert all purpose flour to cake flour.
Converting from all purpose flour to cake flour:
Take one cup of all purpose flour, spooned and leveled. Remove two tablespoons, and then add two tablespoons of cornstarch to the all purpose flour. Sift together before using.
1 cup AP flour – 2 tbsp AP flour + 2 tbsp cornstarch = 1 cup cake flour