1 box yellow cake mix
2/3 c. oil
4 eggs

Mix together. Pour half of the batter into a greased 9 x 13 inch pan.

1/2 c. brown sugar
2 tbsp. cinnamon
1 (8 oz.) carton sour cream

Sprinkle half over the batter. Spread remaining batter on top of sugar mixture. Sprinkle remaining sugar. Take knife to swirl through cake. Bake for 40 minutes at 325 degrees.

ICING:

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

Mix and pour over cake while it is warm.