1 box yellow cake mix
1 sm. carton sour cream
3/4 c. oil
4 eggs
1 c. brown sugar
3 tbsp. cinnamon

ICING:

2 c. confectioners' sugar
1 tsp. vanilla
4 tbsp. milk

Mix first four ingredients together. Pour half of this batter into a 9x13 pan. Mix brown sugar and cinnamon together. Sprinkle half of the sugar mixture over cake batter. Pour in other half of cake batter and remainder of sugar mixture. Take knife and swirl through cake. Bake at 325 degrees F. for 40 minutes.

Mix the ingredients for icing together and pour over the cake, while hot.