You are ready to cook when you reach for an ingredient on the pantry shelf and discover you don't have it. When it comes to flour, it's no big deal as most flours are interchangeable in recipes. Converting cake flour to its equivalent in all-purpose flour is simple and easy, and means you will not have to scrap your recipe if you do not have the right type of flour.
Things You'll Need
Measure 1 cup cake flour into a bowl.
Add 2 tbsp. additional cake flour to the bowl for a total measurement of 1 1/8 cup flour.
Repeat this process if more than 1 cup of all-purpose flour is called for in your recipe.
You also can substitute all-purpose flour for cake flour by decreasing the amount of flour by 2 tbsp. If leavening is required, add 2 1/2 tsp. baking soda to the cake flour.