Quick Cinnamon Roll Cake

Quick Cinnamon Roll Cake 1 (18 1/4 ounce) boxes yellow cake mix 4 eggs 3/4 cup oil 1 cup sour cream 1 cup brown sugar 1 tablespoon cinnamon 2 cups icing sugar 4 tablespoons milk Preheat oven to 325° Grease a 9 x 13 inch baking pan. Mix together cake mix, eggs, oil and sour cream. Pour into prepared baking pan. In a separate bowl combine brown sugar and cinnamon. Sprinkle evenly over cake batter then swirl into batter with a knife. The more you swirl, the more combined it will be so don't over-swirl otherwise the cinnamon/sugar will not be swirly. Bake for 40 minutes. For icing (optional) combine milk with icing sugar and mix thoroughly. Pour over slightly cooled (10-15 minutes on cooling rack) cake.