Cornstarch Cake
["1/2 c. butter", "1 c. sugar", "1/2 c. milk", "1/2 c. cornstarch", "1 1/2 c. flour", "1/3 tsp. salt", "2 tsp. baking powder", "6 egg whites"]
["Cream the butter and sugar well together; add the milk, then the cornstarch and flour sifted with the salt and baking powder. Add last the whites of the eggs beaten to a stiff froth.", "Bake at 350\u00b0 for 45 minutes.", "Use rather shallow pans."]
["butter", "sugar", "milk", "cornstarch", "flour", "salt", "baking powder", "egg whites"]