1 box yellow cake mix
4 eggs
3/4 c. vegetable oil
8 oz. sour cream
1 c. brown sugar
3 tsp. cinnamon

ICING:

2 c. powdered sugar
4 tbsp. milk
1 tbsp. vanilla

Mix. Pour 1/2 of cake mixture in greased 9 x 13 inch pan. Sprinkle 1/2 sugar and cinnamon mixture over then pour the rest of cake mixture over then the rest of the sugar and cinnamon mixture and swirl. Bake 40 to 45 minutes at 325 degrees. Pour icing over cake after it has cooled about 15 minutes.