You bake a cake by creaming butter and sugar together, beating in eggs, and gradually folding in flour, baking powder, and milk until smooth. Pour the batter into greased baking pans and bake in an oven preheated to three hundred and fifty degrees for about twenty five to thirty minutes. Insert a toothpick into the center of the cake to ensure it comes out clean before removing it from the oven. Let the cake cool completely on a wire rack before applying frosting.