Mother'S Lemon Snow Cake
["2 c. sugar", "2 c. all-purpose flour", "1/2 c. cornstarch", "2 tsp. baking powder", "1/4 tsp. salt", "3/4 c. butter (at room temperature)", "1 c. milk", "whites of 7 eggs (at room temperature)", "1 tsp. vanilla"]
["Sift the sugar, flour and cornstarch before measuring.", "Then sift the measured cornstarch, flour, baking powder and salt together 4 times.", "Cream the butter thoroughly and add the sugar a little at a time, creaming it in well.", "Add the dry ingredients alternately with the milk.", "Beat the egg whites into stiff peaks. Fold into the creamed mixture.", "Pour into 3 greased and floured layer cake pans and bake in a 350\u00b0 oven for 25 minutes.", "Cool in pans for 15 minutes.", "Remove from pans and finish cooling.", "Put the layers together with filling."]
["sugar", "flour", "cornstarch", "baking powder", "salt", "butter", "milk", "whites", "vanilla"]