Cups Per PoundThere are 3 13 cups of flour per pound and about 83 13 cups per 25-lb bag. It all depends. The Best All Purpose Gluten Free Flour Mix Recipe Recipe Gluten Free Flour Mix Gluten Free Flour Recipe Gluten Free Flour Blend These measurements assume youre using the traditional method of measuring flour. . Also one cup of butter equals two sticks so one pound of butter is equivalent to two cups. Powdered sugar right out of the box or the plastic bag weighs 4 12 ounces per cup so a 1-pound box or 16 ounces contains about 3 12 cups of powdered sugar. Cooks Illustrated believes that there are about 5 ounces of all-purpose flour in one cup meaning there would be about 16 cups in one five-pound bag. One and 12 pound loaves usually call for 1 cup liquid and 3 cups flour. Cups in a pound of whole-wheat flour. 1 pound of purposeful flour contains about 3 â koob cups. Heres a guide. 1 pound of cake flour co...