Silver White Cake
["2 1/4 c. flour", "1 2/3 c. sugar", "3 1/2 tsp. baking powder", "1 tsp. salt", "1 1/4 c. milk", "2/3 c. shortening", "1 tsp. vanilla", "5 egg whites (no yolks)"]
["Beat flour, sugar, baking powder, salt, milk, shortening and vanilla on low speed for 30 seconds.", "Beat on high speed 2 minutes.", "Add egg whites; beat 2 minutes.", "Bake at 350\u00b0 for 30 to 35 minutes or until done (test with toothpick)."]
["flour", "sugar", "baking powder", "salt", "milk", "shortening", "vanilla", "egg whites"]