Cream 1/2 pound butter, gradually add 2 cups sugar. Add 4 eggs, one at a time, then 3 cups flour with 1/2 teaspoon baking powder and 1 cup buttermilk with 1/2 teaspoon soda. Start with flour and end with flour. Add 1 teaspoon vanilla. Bake at 350° in any type greased pan or pans. This is an excellent plain cake. It can be topped with any flavor icing.