Ribbon Coffee Cake

I occasionally treat my co-workers and this has become the most requested treat. Original recipe came from TOH Quick Cooking.

• Ready In: 55 mins
• Serves: 16

Ingredients

• Cake

• 1 (18 1/4ounce) package  yellow cake mix
• 1  cup sour cream
• 4  eggs
• 2⁄3 cup  vegetable oil
• 1  cup  packed brown sugar
• 1  tablespoon cinnamon

• Icing

• 2  cups powdered sugar
• 1⁄4 cup milk
• 2  teaspoons vanilla

Directions

1. In bowl combine cake mix, sour cream, eggs and oil; beat well.
2. Spread 1/2 of batter into greased 9X13 inch pan.
3. Combine brown sugar and cinnamon; sprinkle over batter.
4. Spread remaining batter over top.
5. Bake in preheated 350 degree oven for 30-35 minutes or until tests done.
6. Combine icing ingredients and drizzle over warm cake.