Instructions

  1. Preheat oven to 350 degrees F.
  2. Mix cake mix, peanut butter, margarine and egg together.
  3. Place 2/3 of the mixture in a greased 9x13 pan.
  4. Heat condensed milk, chocolate chips and butter until melted.
  5. Spoon over mixture that is in the pan.
  6. Cover with the rest of the cake batter.
  7. Bake 25 minutes.