1 box yellow cake mix
4 eggs
3/4 c oil
1 8 oz sour cream
1 c brown sugar
2 tsp cinnamon
2 c powdered sugar
1 tsp vanilla
6 tbsp milk

Mix cake mix, eggs, oil, and sour cream and pour 1/2 of this batter in a 11x 9 inch pan (grease and flour first). Mix 1 c brown sugar and cinnamon. Sprinkle 1/2 of this mixture on top of batter. Put other half of batter on this. Now sprinkle other half of sugar mixture on top. Swirl as you would marble cake.

Bake in 350°F oven for 35 to 40 minutes.

Mix powdered sugar, vanilla and milk and pour over cake when you take it from oven.