Party Cake
["2 1/4 c. flour", "1 1/2 c. sugar", "2 1/2 tsp. baking powder", "1/2 c. shortening", "3/4 c. sweet milk", "1 tsp. vanilla", "1/2 tsp. salt", "4 egg whites"]
["Grease sides of two 8-inch layer pans.", "Line bottom of each pan with waxed paper dusted with flour.", "Sift together flour, sugar, salt and baking powder into a large mixing bowl.", "Add the shortening and 1/2 cup milk; beat 2 minutes on low speed of mixer. Add remaining milk, vanilla and egg whites.", "Beat 2 minutes. Bake in a moderate 375\u00b0 oven for 25 minutes."]
["flour", "sugar", "baking powder", "shortening", "sweet milk", "vanilla", "salt", "egg whites"]