Grease and flour 3 round pans, 8 or 9 X 1-1/2 inches. Beat all ingredients except Creamy Chocolate Frosting in large bowl on low speed 30 seconds, scraping bowl constantly. Beat on high speed 3 minutes, scraping bowl occasionally. Pour into pans. (If necessary, refrigerate remaining batter while two layers are baking.) Bake 8-inch pans 33 to 36 minutes, 9-inch pans 30 to 33 minutes or until no indentation is left when touched lightly. Cool 10 minutes; remove from pans and cool completely. Prepare Creamy Chocolate Frosting. Fill layers with 1/3 cup frosting; frost side and top with remaining frosting. 12 SERVINGS. CHOCOLATE FROSTING: Beat all ingredients on low speed. Stir in additional milk, 1/2 teaspoon at a time, until smooth and of spreading consistency. This recipe produces enough batter to fill three round cake pans, the perfect foundation for a proud and tall layer cake. Prior to the standardization of measurements, bakers either weighed ingredients or used a teacup to keep measurements uniform. One measure of butter, 2 of sugar, 3 of flour and 4 eggs was the easy way to remember the proportions of this heavy, fine-textured cake. Since that time, milk and leavening have been added to the batter. ----