Grandma'S White Cake
["3/4 c. shortening", "1 1/3 c. sugar", "1 1/2 tsp. vanilla", "2 1/2 c. sifted cake flour", "3 tsp. baking powder", "1 tsp. salt", "1 c. skim milk", "5 egg whites", "1/3 c. sugar"]
["Note:", "If your cake flour has the baking powder and salt already in it, then omit these 2 ingredients."]
["shortening", "sugar", "vanilla", "cake flour", "baking powder", "salt", "milk", "egg whites", "sugar"]