Rippled Coffee Cake
["1 yellow cake mix", "1 (8 oz.) sour cream", "4 eggs", "2/3 c. oil", "1 c. brown sugar", "1 Tbsp. cinnamon", "1/4 c. milk", "2 tsp. vanilla", "2 c. powdered sugar"]
["Mix together cake mix, sour cream, eggs and oil. Pour in sprayed cake pan. Mix together brown sugar and cinnamon and swirl through cake batter. Bake cake at 350\u00b0 until cake tester comes out clean. Mix milk, vanilla and powdered sugar and pour over cake."]
["yellow cake", "sour cream", "eggs", "oil", "brown sugar", "cinnamon", "milk", "vanilla", "powdered sugar"]