Fluffernutter Bars are soft yet chewy homemade cookie bars packed with sweet marshmallow fluff and rich peanut butter flavor. They’re easy to make, fun to share, and guaranteed to become a family favorite!
Preheat oven 350°F and line a 9x13 baking dish with parchment paper or grease it well with nonstick cooking spray.
In the bowl of a stand mixer, or a large bowl with hand mixer, cream together the softened butter, peanut butter and brown sugar until light and fluffy. This will take 1-2 minutes.
Add the eggs, one at a time beating well after each addition.
Mix in the vanilla extract.
Add the salt and all purpose flour. Mix on low speed just until everything is combined.
Take ⅔ of the dough and press it out into an even layer in the prepared baking dish.
Spread the marshmallow fluff over top of the dough with an offset spatula.
Take chunks of the remaining dough and gently flatten them, and lay them on top of the marshmallow fluff letting some of the fluff peek through.
Sprinkle the peanut butter chips over top of it all and gently pat them down.
Bake the bars in preheated oven on center rack for 30-35 minutes until golden brown, set and no longer wet looking.