1 box yellow cake mix
4 eggs
8 oz. sour cream
3/4 c. oil
1/2 c. sugar
3/4 c. brown sugar
3 tsp. cinnamon

Mix first 5 ingredients and pour half into a greased and floured 9x13-inch pan. Combine cinnamon and brown sugar. Sprinkle half over cake batter. Pour remaining batter over cinnamon mixture. Top with remaining cinnamon mixture.

Bake at 350°F for 45 minutes or until done.

Icing:

2 1/2 c. powdered sugar
2 tsp. vanilla
4 to 5 tbsp. milk

Combine powdered sugar, vanilla and milk. Pour over hot cake.