1/3 C. butter or margarine, softened 1/2 C. butter 1/4 C. packed brown sugar 1 egg, beaten 1 C. all-purpose flour 1/2 tsp. baking powder 1/4 tsp. baking soda 1/2 tsp. ground cinnamon 1/2 C. buttermilk
Topping: 1/4 C. packed brown sugar 1/4 tsp. ground cinnamon 1/8 tsp. ground nutmeg
In a mixing bowl, cream butter and sugars. Add egg; mix well. Combine flour, baking powder, baking soda and cinnamon; add to creamed mixture alternately with buttermilk; beat well. Spread into a greased 8" square baking pan.
Topping: Combine ingredients; sprinkle over batter. Cover and refrigerate overnight. Bake, uncovered, at 350F for 40 to 45 minutes or until a toothpick comes out clean.