Lo-Cal White Cake
["1/2 c. sugar", "1 tsp. baking powder", "1 c. hot water", "3 egg whites", "2 c. cake flour"]
["Preheat oven to 350\u00b0.", "Mix sugar, flour and hot water.", "Beat eggs until whites are very stiff.", "Fold in baking powder and egg whites.", "Bake in cake pan until done by checking with toothpick."]
["sugar", "baking powder", "water", "egg whites", "cake flour"]