Peanut Butter Marshmallow Squares Recipe

Looking for a quick no-bake dessert that’s creamy, chewy, and delicious? These Peanut Butter Marshmallow Squares, also called marshmallow peanut butter squares, are a family favorite. With just a few ingredients, you’ll have a sweet treat that’s perfect for parties, bake sales, or everyday snacking. For another fun variation, try this Rocky Road Candy Recipe for a chocolatey twist.

Why You’ll Love Peanut Butter Marshmallow Squares

Quick & Easy: Just 20 minutes of prep.
No-Bake: Perfect when you don’t want to turn on the oven.
Kid-Friendly: Sweet, soft, and fun to make with children.
Customizable: Add nuts, coconut, or colorful marshmallows for a twist.
Crowd-Pleaser: A nostalgic dessert that always disappears fast.

Ingredients (Makes 18 Squares)

1 (11-ounce) package butterscotch chips
1 cup creamy peanut butter
½ cup unsalted butter
3 ½ cups miniature marshmallows (regular or colored)
1 cup shredded coconut (optional)
1 cup chopped walnuts (optional)

Tip: For peanut butter marshmallow squares without butterscotch chips, replace them with white chocolate chips or caramel chips.

Step-by-Step Instructions

Step 1: Prepare the Pan Grease a 9x13-inch baking pan or line it with parchment paper for easy cleanup.

A 9x13-inch baking pan lined with parchment paper, filled with a smooth peanut butter marshmallow mixture, ready for baking.

Step 2: Melt the Base In a saucepan over low heat, combine the butterscotch chips, peanut butter, and butter. Stir continuously until the mixture is smooth and creamy.

A saucepan on low heat with a wooden spoon stirring a smooth, creamy mixture of melted butterscotch chips, peanut butter, and butter, with additional butterscotch chips visible.

Step 3: Cool Slightly Remove from heat and allow to cool for 2–3 minutes so the marshmallows don’t melt completely.

A stainless steel saucepan on a stove with a warm peanut butter mixture steaming, a wooden spoon with peanut butter residue resting nearby, used for Peanut Butter Marshmallow Squares.

Step 4: Add Marshmallows & Mix-Ins Fold in miniature marshmallows along with coconut and walnuts if desired. Stir gently to coat.

A stainless steel saucepan with a peanut butter mixture being stirred with a wooden spoon, mixed with miniature marshmallows, coconut, and walnuts for Peanut Butter Marshmallow Squares.

Step 5: Transfer to Pan Spread the mixture evenly into the prepared pan, pressing lightly with a spatula to flatten.

A 9x13-inch pan lined with parchment paper, filled with a peanut butter mixture being spread evenly with a spatula, topped with miniature marshmallows, coconut, and walnuts for Peanut Butter Marshmallow Squares.

Step 6: Chill & Cut Refrigerate for at least 1 hour until firm. Cut into 18 squares and enjoy!

A plate with neatly cut Peanut Butter Marshmallow Squares, featuring a peanut butter base topped with miniature marshmallows, coconut, and walnuts, with some squares stacked.

Nutrition (Per Square)

Calories: ~318
Fat: 23g
Carbs: 25g
Protein: 5g

Tips & Variations

Nut-Free: Omit the walnuts for an allergy-friendly alternative.
Festive: Use colorful marshmallows for holidays and parties.
Extra Chewy: Add more marshmallows for a softer bar.
Simple Version: Skip coconut and nuts for a classic square.

Frequently Asked Questions (FAQs)

1. Can I make peanut butter marshmallow squares ahead of time? Yes! These squares store well in the fridge for up to 5 days, making them a great make-ahead dessert. 2. What type of peanut butter works best for this recipe? Creamy peanut butter works best, but you can also use crunchy peanut butter if you prefer added texture. 3. Can I freeze peanut butter marshmallow squares? Absolutely. Wrap them tightly and store in an airtight container in the freezer for up to 2 months. 4. How do I keep the marshmallows from melting too much? Let the melted peanut butter mixture cool slightly before mixing in the marshmallows so they stay soft and chewy. 5. Can I add other ingredients to these squares? Yes! You can mix in chopped nuts, chocolate chips, or even dried fruit for extra flavor and variety.

Conclusion

These creamy no-bake dessert bars are one of the easiest and most nostalgic treats around. Whether you call them marshmallow peanut butter squares, pb marshmallow squares, or even peanut butter marshmallow bars, they’re always a hit. Make them for family gatherings, holidays, or anytime you want a quick and satisfying sweet treat—you won’t be disappointed!