Fluffernutter Cookie Bars are the best rich and fudgy dessert bars! Marshmallow Peanut Butter Chocolate Chip Cookie Bars are a chocolate and peanut butter lovers dream, and the marshmallow fluff make the richest, fudgiest cookie bars. Gooey on the inside, chewy on the outside. #peanutbutter#chocolate#fluffernutter#dessert#recipe