* Preheat oven to 350 degrees F
* Spray a baking/casserole pan with cooking spray.
* In a bowl combine cake mix, water, eggs, oil and 1/3 cup of the peanut butter. Beat until blended
* Spread into pan. Then drizzle with remaining peanut butter.
* Arrange the peanut butter cups throughout the pan.
* Bake 25-30 mins or until a toothpick comes out clean.
* Cool 20 mins at least before cutting