1 box yellow cake mix
1 (8 oz.) sour cream
4 eggs
3/4 c. oil
1 tbsp. cinnamon
1 c. brown sugar

GLAZE:

2 c. confectioners sugar
4 tbsp. milk
1 tbsp. vanilla flavoring

Mix first four ingredients by hand. Pour 1/2 batter into well-greased 9 x 13 inch pan. Mix the next three ingredients well. Sprinkle over batter. Pour remaining batter over this and swirl with a knife. Bake at 325 degrees for 40 minutes. Mix ingredients for glaze and pour over cake while still hot.