Can you substitute cake flour for all purpose flour?

Cake flour cannot be substituted for all-purpose flour in all baking recipes. All purpose flour has a higher protein content than cake flour - meaning it produces more gluten, which can result in a denser and chewier texture when used in recipes that call for cake flour. It is best to use cake flour when the recipe specifically requires it. If no flour type is specified in a recipe, all purpose flour can be used in most cases.