In medium mixing bowl, blend to above ingredents together. Beat thoroughly for 30 seconds and spread in a greased round pan 9x1 1/2-inch pan or an 8x8x2-inch pan. We use a tart pan with a removable bottom so the coffee cake may be removed from the pan and displayed on a pretty heat proof serving plate.
Combine 1/3 cup flour, 1/2 cup brown sugar, 1/2 teaspoon cinnamon and 1/4 cup firm butter. Sprinkle over batter.
Bake in a 375 degree oven for 25 to 30 minutes, until done. Don't overbake.
Serve warm with butter or honey.
Confectioners sugar may be sprinkled over the top of the coffee cake.