1 box Duncan Hines golden yellow butter cake mix
1/2 c. sugar
4 eggs
2 tsp. cinnamon
3/4 c. oil
1 sm. carton sour cream
2 tbsp. brown sugar

Mix first 3 ingredients well. Add eggs, one at a time and mix well after each egg. Add sour cream and mix well at low speed. Grease and lightly flour tube pan. Pour half of batter in tube pan. Sprinkle brown sugar and cinnamon on top of batter and cover that with remaining batter. Bake at 300 degrees for 45 to 75 minutes until toothpick inserted comes out fairly clean.