FILLING:

1/2 c. peanut butter
1/4 stick butter
1/2 c. powdered sugar

Cream filling ingredients together.

CAKE:

1 pkg. yellow cake mix
4 1/2 oz. instant milk chocolate pudding mix
1 c. oil
4 eggs
1 c. sour cream
1 tsp. vanilla

Blend and beat cake ingredients 4 minutes. Let stand 15 minutes. Pour batter into two 9 inch cake pans, greased and floured. Sprinkle 1/2 package of 6 ounce chocolate chip bag over each pan, pushing chips into batter. Bake at 350 degrees until toothpick comes out clean from center of cake. Cool. Put filling between layers and frost with can of milk chocolate frosting.