Peanut Butter Mallow Bars are a delicious no-bake treat suitable for any occasion. Whether you’re hosting a birthday party, packing for a picnic or making sweets for the holidays, peanut butter mallow bars will make a delicious addition.

Ingredients to Make Peanut Butter Mallow Bars Recipe

These scrumptious ooey gooey Peanut Butter Mallow Bars are one of my favorite nostalgic childhood sweet treats. These sweet all-inclusive mallow bars could be adapted using vegan or gelatin-free marshmallows. They were inspired by a delectable chewy peanut butter bar from my childhood, that I adored. The texture of these mallow bars is slightly chewy from the marshmallows melted into the candy bars mixture. The peanut butter flavor complements the crunch of the peanuts and nutter butter cookies perfectly. They’re certain to curb your sweet tooth. Ingredients to make No Bake Peanut Butter Marshmallow Bars: (Scroll down for full printable recipe card.)

Peanut Butter: Creamy peanut butter, use your favorite brand.
Marshmallows: Miniature marshmallows.
Nuts: Chopped salted peanuts for crunch.
Milk: Two cans of sweetened condensed milk.
Baking Chips: One 10-ounce package of peanut butter chips.
Cookies: Crushed nutter butter cookies.
Butter: Salted or unsalted butter.
Flavoring: Vanilla extract lends sweet floral notes to the flavor.

How to Make Homemade Peanut Butter Mallow Bars Recipe

Prepare the Pan – Use softened butter to grease the bottom and sides of an 8×8-inch pan. Set aside.
Sweetened Condensed Milk and Peanut Butter – Melt together the sweetened condensed milk and peanut butter in a large saucepan. Cook over low heat for around 8-10 minutes until heated through gently bubbling. Stir constantly to avoid sticking.
Peanut Butter Chips – Remove from the heat adding the vanilla extract and the peanut butter chips. Stir until the chips are completely melted.
Cookies – Mix-in the chopped Nutter Butter cookies and marshmallows. Stir until evenly distributed. Some marshmallows should remain whole.
Transfer to Pan – Working quickly, pour into the prepared square pan and spread evenly.
Garnish – Sprinkle the top of the mallow bars with chopped peanuts. Chill 2 hours or until set, then slice into desired sized pieces.

Tips for Making Peanut Butter Mallow Bars

Kitchen Tools You’ll Need: A large saucepan or pot, measuring cups and spoons, a sharp knife and cutting board, an offset spatula or rubber spreading spatula and an 8×8-inch or 9×9-inch nonstick square baking pan.
Line the Pan with Parchment Paper: You can line the square pan with parchment paper if you’d like to lift the bars out of the pan for slicing. Use two strips of parchment paper leaving enough overhang to serve as handles for lifting. Butter the parchment paper.
Work Quickly Before the Mallow Bars Set: These homemade peanut butter bars are like fudge in that you need to work fairly quickly when combining the ingredients and spreading them into the pan. In light of that, have everything ready before you begin to expedite the process.
Some of the Mini Marshmallows Won’t Melt: The marshmallows won’t completely melt into the warm peanut butter mixture by design. You want to be able to see some of them in the mallow bars, hence the name.
A Little Goes a Long Way: These peanut butter bars taste rich. In light of that, I recommend that you slice or cut them into small squares much like you would chocolate fudge.
When to Serve: These Peanut Butter Mallow Bars are ideal for game day snacking, picnics, potluck parties, camping snack, classroom snacks (if peanut butter is allowed) and Christmas, Thanksgiving or Easter sweets.

Recipe Variations

Peanut Butter: You can experiment using other nut butters in place of peanut butter.
Baking Chips: You can use semi-sweet chocolate chips, butterscotch chips or white chocolate chips to change the flavor profile.
Cookies: You can use a different sandwich cookie to complement the flavor that you want to create.

Storage and Leftovers

Leftovers: Store Peanut Butter Mallow Bars in an airtight container chilled in the refrigerator for up to one week.
Freezer Storage: You can also freeze these no bake peanut butter marshmallow squares in a freezer-safe container for up to 2 months.

More No Bake Bars and Desserts to Make

Yummy no bake desserts are a lifesaver when the going gets tough and you’re short on time. You may also like to try these:

Strawberries and Cream Krispies Treats are a fun warm weather treat.
Sweet and spicy No Bake Cinnamon Crunch Bars.
Chocolate Coconut Toffee Bars are full flavored and simple to make.
No Bake S’mores Bars are made with cereal smothered in a chocolate marshmallow coating.
Butterscotch Rice Krispies Treats are a grown up treat.
Reese’s Cup Scotcheroos are a twist on classic scotcheroos everyone will love.
Chocolate Marshmallow Bars from Cravings of a Lunatic.

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