Flour

Be sure to use the flour specified in the recipe. Bleached cake flour and bleached all-purpose flour can be used interchangeably when either is indicated as long as the weight used is the same. If you plan to use a volume measure instead, you will find it listed on the ingredient charts. If a recipe calls for cake flour as the first choice, using it results in a more tender crumb, so if you desire to achieve this level of tenderness, and you have only bleached all-purpose flour, you will need to use the suggested amount of cornstarch in place of some of the all-purpose flour or a slight increase in baking powder (see Ingredient Equivalencies and Substitutions). Do not, however, substitute cake flour in recipes calling only for all-purpose flour as the cakes will be too tender and fragile.