Mix peanut butter and margarine on low speed of mixer. Add powdered sugar mixing until blended.
Add crushed cereal until thoroughly mixed.
Press about 2 T into each baking cup.
Place about 1/2 tsp marshmallow creme onto center of each cup.
Melt chocolate chips and shortening together and mix well. Place 1/2 tsp on top of marshmallow creme and gently spread covering the entire top area of cookie. Enjoy!