1 box Duncan Hines butter cake mix
4 eggs
1/3 c. oil
8 oz. sour cream
1 c. brown sugar
3 tsp. cinnamon

Combine and mix the cake mix, eggs, oil and sour cream. Place 3/4 of mixture in a 13x9 greased pan. Mix brown sugar and cinnamon, sprinkle over mixture. Swirl. Add remaining batter. Bake 30 minutes in 350 degree oven.