Sub Cake Flour with A/P Flour + Corn Starch

To substitute cake flour for all-purpose flour use 1 cup plus 2 tablespoons cake flour for every cup of all-purpose flour. Make your own - one cup sifted cake flour can be substituted with 3/4 cup (84 grams) sifted bleached all-purpose flour plus 2 tablespoons (15 grams) cornstarch.

A/P Flour - 84 grams (3/4 cup)
Corn Starch - 15 grams (2 tbsp)

Read more: http://www.joyofbaking.com/flour.html#ixzz18mYpllq7