Cinnamon Sour Cream Coffee Cake

Cake mix based coffee cake with a cinnamon crumb topping.

• Ready In: 45 mins
• Serves: 24

Ingredients

• Cinnamon Crumb Topping

• 1⁄2 cup flour
• 1⁄2 cup  firmly packed brown sugar
• 4  teaspoons cinnamon, ground
• 1⁄2 cup butter, melted
• 1  cup  chopped walnuts

• Coffee Cake

• 1 (18 1/4ounce) package  yellow cake mix
• 1  egg
• 1  cup sour cream
• 1⁄4 cup butter, melted
• 1  teaspoon vanilla extract

Directions

1. 1. Preheat oven to 350°F
2. 2. Mix topping ingredients in a medium bowl until large crumbs form and set aside.
3. 3. Beat cake mix, egg, sour cream, butter, and vanilla in a large bowl with an electric mixer on medium speed for about 1 minute or until just mixed.
4. 4. Spread evenly in greased and floured 13x9-inch baking pan.
5. 5. Sprinkle topping mixture over batter.
6. 6. Bake 25 to 30 minutes or until cake pulls away.