1 box yellow cake mix
3 eggs
3/4 c. oil
8 oz. sour cream

Mix by hand; cake mix, eggs, oil, sour cream. Spread 1/2 of batter in pan. Then mix 1 cup brown sugar, 1 tablespoon cinnamon. Pat over batter. Then spread rest of batter over brown sugar mixture. Bake at 325 for 40 minutes. Mix together 1 cup powdered sugar, cream and butter. Pour over cake while still hot.