Tunnel of Fudge Cake

This is Ben's all-time favorite cake. You can't go wrong with fudge filling!

Tunnel of Fudge Cake
1 1/2 cups milk
3 1/2 ounces cook & serve chocolate pudding
1 cup semisweet chocolate chips
1 chocolate cake mix
3/4 cup powdered sugar
1/4 cup unsweetened cocoa powder
6 Tablespoons milk
chopped peanuts, optional

1. In medium pan, combine 1 1/2 cups milk and pudding mix. Cook as directed on package. Add chocolate chips and stir until melted. Set aside.
2. Preheat oven to 350 degrees. Grease and flour a 10-inch bundt pan.
3. Follow directions on cake mix box to make cake batter.
4. Pour 2 cups of the cake batter into greased and floured pan. Spoon filling in ring on top of batter, making sure it doesn't touch the sides of the pan. Pour remaining batter over filling.
5. Bake at 350 according to package directions for a bundt pan or until cake springs back when touched lightly in the center. Cool 1 hour in pan, then turn onto a wire rack and cool completely.
6. In a small bowl, combine powdered sugar and 1/4 cup cocoa. Add enough milk for desired drizzling consistency. Spoon over top of cake, allowing some to run down the sides. Top with chopped peanuts, if desired.