1 yellow cake mix
3/4 cup vegetable oil
4 eggs
1-8 oz pkg sour cream
1 cup brown sugar
1 T cinnamon
Icing: 2 cups powdered sugar
1 T vanilla
4 T milk
Preheat oven to 325 degrees. Combine cake mix, oil, eggs, and sour cream. Stir by hand until big lumps are gone. Pour half the batter into ungreased 9×13 glass baking dish. Combine brown sugar and cinnamon and sprinkle over the batter in cake pan. Spoon the other half of batter into cake pan, covering the brown sugar and cinnamon. Swirl the cake with a butter knife.
Bake 40 minutes or until a toothpick comes out clean. Frost cake while its still fairly hot. Serve warm.
Icing: Whisk powdered sugar, milk, and vanilla until smooth. Drizzle over the top of the cake.
