1 pkg. Pillsbury Plus yellow cake mix
1/2 c. firmly packed brown sugar
1 c. chunky peanut butter
1 c. water
1/4 c. oil
3 eggs
1/2 c. semi-sweet chocolate chips
1/2 c. peanut butter chips
1/2 c. chopped peanuts

Heat oven to 350 degrees. Grease and flour 13 x 9 inch pan. In large bowl combine, cake mix, brown sugar, and peanut butter with a fork until crumbly. Reserve 1/2 c. of peanut butter mixture, set aside. To remaining peanut butter mixture, add water, oil and eggs. Mix at low speed with the mixer for 2 minutes. Fold 1/4 cup of the chocolate chips and 1/4 cup of peanut butter chips into batter. Pour batter into prepared pan. In small bowl, combine reserved 1/2 cup peanut butter mixture, remaining chocolate chips and peanuts; sprinkle evenly over batter.

Bake at 350 degrees for 40 to 50 minutes or until toothpick inserted in comes out clean. Immediately sprinkle remaining peanut butter chips; gently press into top of cake. Cool completely. 12 to 15 serving.