My box of Swan's Down Cake flour also calls for an additional 2 tablespoons of cake flour to be added to every cup of all purpose flour the recipe calls for- so if your recipe calls for using two cups of AP flour, use two cups + four tablespoons of cake flour. Cake flour must be much finer ground than AP , and I have successfully used this swap when I found myself only having cake flour on hand . Happy baking...ch
Yes, depending on the cake. Cake flour contains substantially less protein than all-purpose (30% less), so if your recipe is predicated on the higher protein content of AP flour, perhaps add an additional egg to compensate.
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