Step 1

Measure out 2 tablespoons of cornstarch and place it in a 1-cup measuring cup.

Step 2

Gently spoon all-purpose flour into the cup over the cornstarch. Don’t pack the flour down in the cup. Just lightly spoon it in until the cup will hold no more flour then use the back of a knife to level off the cup.

Step 3

Sift the mixture 4-6 times to thoroughly combine and aerate the flour. Repeat for every cup of cake flour called for in a recipe.