No-Bake Peanut Butter Marshmallow Squares You’ll Crave Daily
Last Updated on March 4, 2026 by Stella Recipes
The moment I take a bite of these Peanut Butter Marshmallow Squares, I m transported back to simpler times think backyard barbecues and sweet indulgences at grandma s house. There s nothing quite like the combination of creamy peanut butter and fluffy mini marshmallows to evoke those childhood memories. What I love most about this no-bake treat is how effortlessly it comes together, making it a lifesaver on busy days when dessert feels like a daunting task.
Perfect for family gatherings or just a cozy night in, this recipe offers a delightful blend of rich flavors and chewy textures that will satisfy any sweet tooth. And the best part? You don t need to turn on the oven! In just a few simple steps, you can whip up these squares and watch them disappear in no time. So grab your ingredients, and let s create a bite-sized treat that will have everyone asking for seconds!
Why are Peanut Butter Marshmallow Squares so irresistible?
Effortless to Create: You ll be amazed at how simple these squares are to whip up, requiring no baking. Just melt, mix, and chill!
Nostalgic Flavor: Each bite transports you back to carefree childhood days filled with sweet treats and laughter.
Perfect for Any Occasion: Whether it s a family gathering or a quiet movie night, these squares are sure to delight everyone.
Crowd-Pleasing Treat: With their creamy peanut butter and chewy marshmallows, there s no way anyone can resist going back for more.
Quick to Prepare: In less than 30 minutes of prep time, you can have these tasty treats ready to set!
Versatile Options: Want to get creative? Swap in your favorite flavored chips or add festive sprinkles for special occasions!
Peanut Butter Marshmallow Squares Ingredients
For the Base
- Unsalted Butter Adds richness and moisture; substituting with margarine also works.
- Creamy Peanut Butter Provides flavor and structure; natural peanut butter is a great alternative.
- Butterscotch Chips Offers sweetness and a contrasting flavor; you can replace them with chocolate or white chocolate chips for a different twist.
- Mini Marshmallows Contribute chewy texture and sweetness; colored marshmallows add a fun, festive touch.
- Vanilla Extract Enhances overall flavor; always go for pure vanilla for the best taste.
How to Make Peanut Butter Marshmallow Squares
Melt Butter: In a large saucepan, melt unsalted butter over low heat, stirring gently until it becomes shiny and fully liquefied this usually takes about 3-5 minutes.
Combine Ingredients: Add creamy peanut butter and butterscotch chips to the melted butter. Stir continuously until the mixture is completely smooth and free of lumps, which should take around 2-3 minutes.
Add Flavor: Remove the pan from the heat and stir in the vanilla extract until it s evenly mixed throughout the creamy mixture, making sure that lovely aroma fills the air.
Fold in Marshmallows: Carefully fold the mini marshmallows into the mixture, being cautious not to crush them. This keeps their fluffy texture intact for that chewy bite!
Transfer to Dish: Pour the mixture into a greased 9 13 inch baking dish. Use a spatula to spread and level it out evenly, ensuring each square will have the perfect shape.
Set: Press down firmly to create an even layer and chill at room temperature for 2 hours, or pop it in the refrigerator for a faster setting about 1 hour should do.
Slice: Once set, cut into squares approximately 1.5 inches for delightful bite-sized pieces that are easy to share and enjoy!
Optional: Drizzle melted chocolate on top for an extra layer of deliciousness.
Exact quantities are listed in the recipe card below.
Peanut Butter Marshmallow Squares Variations
Feel free to unleash your creativity and customize these delightful squares to suit your taste buds!
Chocolate Lovers: Swap butterscotch chips for semi-sweet chocolate chips for a richer flavor. This twist creates a fudgy delight that s hard to resist!
Nutty Crunch: Add chopped nuts, like walnuts or pecans, for a satisfying crunch. The texture complements the chewy marshmallows beautifully, bringing a delightful contrast to every bite.
Dairy-Free Delight: Replace unsalted butter with coconut oil and use dairy-free chocolate chips to make this treat vegan-friendly. You won t miss a beat with this creamy alternative!
Spicy Twist: Incorporate a pinch of cayenne or chili powder for a surprising kick. This adds an unexpected layer of flavor that tantalizes the taste buds, elevating your squares to a new level.
Fruity Fun: Toss in some dried cranberries or chopped dried apricots to add fruity sweetness. These add a colorful touch, creating a visually appealing and flavor-packed treat.
Minty Freshness: Mix in peppermint extract or crushed peppermint candies for a cool twist. Perfect for holiday gatherings, this refreshing flavor is sure to impress your guests!
Festive Colors: Use pastel or holiday-themed marshmallows to add a pop of color. This simple change makes your squares fun for parties, showers, and special occasions.
Peanut Butter Variants: Try crunchy peanut butter instead of creamy for a delightful texture. The added nuttiness enhances the squares while keeping their signature taste.
How to Store and Freeze Peanut Butter Marshmallow Squares
Room Temperature: Store the squares in an airtight container at room temperature for up to 3 days to maintain their chewy texture.
Fridge: Keep them in the refrigerator in an airtight container for up to a week, preventing them from getting too soft and sticky.
Freezer: For longer storage, individually wrap each square in plastic wrap and place them in a freezer bag. These Peanut Butter Marshmallow Squares can be frozen for up to 2 months.
Thawing: When ready to enjoy, simply thaw the squares in the fridge for a few hours or at room temperature for about 30 minutes.
Expert Tips for Peanut Butter Marshmallow Squares
Melt Carefully: Monitor the butter closely while melting to avoid burning; keep the heat low for a smooth base.
Smooth Mixture: Ensure your peanut butter, butter, and butterscotch chips are completely smooth before adding marshmallows; lumps can affect the final texture.
Chill Time Counts: Don t rush the setting process; letting the squares chill longer in the fridge will yield firmer, chewier treats.
Creative Adds: Personalize your Peanut Butter Marshmallow Squares by adding festive sprinkles or trying different flavored chips for delightful variations.
Even Slicing: For perfectly shaped squares, use a sharp knife and cut when the mixture is set but still slightly soft it makes for cleaner edges!
What to Serve with Peanut Butter Marshmallow Squares?
Elevate your dessert experience with delightful pairings that perfectly complement these chewy, nostalgic treats.
Cold Milk:
A classic pairing, the creamy coldness of milk enhances the rich flavors and balances the sweetness of the squares.Hot Chocolate:
Indulge in a cozy drink that warms the soul. The chocolatey richness pairs beautifully with the peanut butter and butterscotch notes.Fresh Berries:
Bright, juicy berries add a refreshing contrast in flavor and texture, creating a vibrant touch to your dessert platter.Ice Cream Scoops:
Serve your squares alongside a scoop of vanilla or chocolate ice cream for a decadent dessert experience that the whole family will adore.Coffee or Espresso:
The boldness of coffee brings out the sweetness of the squares, making it a perfect pairing for afternoon treats or after-dinner delights.Whipped Cream Topping:
A light dollop of whipped cream can elevate your squares, providing a fluffy, airy texture that treats the taste buds to a delightful experience.Nutty Granola:
A sprinkle of crunchy granola offers a lovely textural contrast while enhancing the nutty flavors of the peanut butter in each square.Chocolate Dipping Sauce:
An extra drizzle of warm chocolate sauce creates a luxurious finish to each bite, making every square even more irresistible.
Make Ahead Options
These Peanut Butter Marshmallow Squares are perfect for meal prep and can save you precious time on busy days! You can prepare the mixture up to 24 hours in advance by melting the butter, mixing in the peanut butter, butterscotch chips, and vanilla extract, then folding in the marshmallows. After mixing, refrigerate the mixture until you re ready to pour it into the baking dish. When you re ready to serve, simply spread it in the dish, chill for about 1 hour to set, and then slice. For optimal taste and texture, store the squares in an airtight container in the refrigerator, where they ll stay fresh for up to one week. Enjoy heavenly no-bake treats without the last-minute rush!
Peanut Butter Marshmallow Squares Recipe FAQs
How do I choose the right peanut butter for my squares?
Absolutely! For these squares, creamy peanut butter is ideal as it provides smoothness and structure. You can opt for natural peanut butter too, just be aware that it might change the texture slightly, giving a more nutty flavor.
How should I store the Peanut Butter Marshmallow Squares?
You can store the squares in an airtight container at room temperature for up to 3 days. If you prefer them a bit firmer, keep them in the refrigerator, where they ll last up to a week.
Can I freeze Peanut Butter Marshmallow Squares?
Very much! Wrap each square individually in plastic wrap and place them in a freezer-safe bag or container. They can be frozen for up to 2 months. When ready to enjoy, just let them thaw in the fridge for a few hours or at room temperature for about 30 minutes.
What if my mixture is lumpy before adding marshmallows?
If you find your mixture has lumps, don t worry! Simply return it to low heat and stir until smooth. Make sure to allow the mixture to cool slightly before folding in the marshmallows, as this prevents them from melting.
Are Peanut Butter Marshmallow Squares safe for pets or those with allergies?
Not for pets! Peanut butter can be harmful to dogs if it contains xylitol, so be sure to use a safe version. Additionally, those with nut allergies should avoid this recipe, and for gluten-free options, ensure all your ingredients are certified gluten-free.
Can I add different ingredients to the squares?
Absolutely! Feel free to customize your squares by adding sprinkles for a fun twist or swapping butterscotch chips for chocolate or white chocolate ones. You could even fold in nuts for an extra crunch!