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

Combine cake mix, oil, eggs, sour cream and vanilla. Pour half of mixture into a 9 x 13-inch greased and floured pan. Mix brown sugar and cinnamon and sprinkle half over batter; swirl with a fork into cake. Pour remaining batter on top and spread. Top with brown sugar and cinnamon; swirl with fork.

Bake at 325°F for 40 to 45 minutes. When done, pour glaze on top.

Glaze:

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

Mix ingredients and pour over warm cake. If too thick, more milk may be added.