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Remember those delightful treats from childhood potlucks? Butterscotch confetti squares are just that—a nostalgic no-bake dessert that combines creamy peanut butter, sweet butterscotch chips, and colorful mini marshmallows into chewy, irresistible bites. They’re incredibly easy to make and perfect for satisfying your sweet tooth without turning on the oven. Whether you’re looking to share a simple dessert at a gathering or indulge in a quick homemade treat, these squares are sure to bring a smile to your face.
Confetti squares are smooth, fudgy and dense when chilled or silky, creamy and chewy with mini marshmallows at room temperature. They’re just so good.
Also, try cream cheese brownies or chocolate cherry brownies. Mini cone cupcakes and peanut butter and chocolate cupcakes are also addictive!
Why You’ll Love It
Colorful: Sweet recipes don’t have to be colorful to be appealing. After all, would you say no to a square of your favorite chocolate or a block of fudge? The colorful appearance of these confetti squares makes them look extra-appealing, and very pretty.
Simple: Making peanut butter confetti squares is easy because you must melt butter and mix the ingredients before letting it set. That’s all! No baking is required.
Deliciously different: There are plenty of recipes with mini marshmallows, plenty with butterscotch chips, and lots with peanut butter. This recipe, however, brings them all together with a couple of other tasty ingredients for a deliciously different sweet treat.
Butterscotch Confetti Squares Ingredients
A complete list of ingredients and amounts can be found in the recipe card below.
Butterscotch chips: Rich and sweet.
Salted butter: Or you can use unsalted butter and add a small pinch of salt.
Vanilla extract: Adds a rich complementary flavor.
Mini marshmallows: Colorful rainbow ones give the prettiest effect.
Peanut butter: Adds a nice nutty taste.
How to Make Confetti Squares
For more detailed instructions with weights and measurements, jump to the printable recipe card.
Prepare a baking pan: Line a 9-inch square baking pan with wax paper, then add cooking spray.
Melt some of the ingredients together: Heat and stir the butterscotch chips, peanut butter, and salted butter together in a pan over medium-low heat until smooth.
Add the other ingredients: Add the vanilla extract and salt, and then all except a cup of rainbow marshmallows.
Add the confetti squares mixture: Spoon it into the prepared pan and press down, then sprinkle the reserved mini marshmallows on top and press them down to stick.
Chill the peanut butter confetti squares: Let the mixture cool to room temperature, then chill in the fridge for an hour or until set. Cut into squares and serve.
Substitutions and Variations
Salted butter: If you only have unsalted butter, you can use that in the confetti squares recipe and just add a pinch of salt to the recipe (this really brings out the sweet flavors and stops it from being too sweet).
Peanut butter: Feel free to use crunchy peanut butter if you prefer that kind of you want some crunch in your marshmallow bars.
Chocolate chips: Chocolate chips are nice in here, either regular chocolate chips or another kind.
Optional add-ins: Chopped nuts, raisins or shredded coconut would also work in peanut butter confetti squares.
Add cereal: You could even add Rice Krispies for texture or another favorite fruit-flavored cereal.
Serving Suggestions
With a drink: Enjoy these with a cup of coffee, hot chocolate or iced tea
Give as a gift: Why not package them up in cellophane and give as gifts, perhaps paired with a cookie mix in a jar or homemade whipped shea butter!
As an ice cream topping: Chop them small, and you can use them as an ice cream sundae topping.
How to Store Confetti Bars
Store: Keep them in an airtight container for up to a week.
Freeze: Can you freeze confetti squares? Yes, you can freeze them with parchment paper between each piece to stop them from sticking together. They will be good for up to 3 months but will start to lose their flavor if frozen for longer. Thaw at room temperature or in the refrigerator.
Top Tips
Mini marshmallows: Chop regular marshmallows into small pieces if you don’t have mini ones.
Adding the marshmallows: Make sure the mixture is cool enough not to melt the marshmallows but warm enough to stir easily. Be quick here – you don’t want the mixture to cool too much, and set before you mix in the marshmallows!
Make extra: These always disappear too fast!
Peanut Butter Marshmallow Squares FAQs
This is a Canadian recipe, also known as confetti slice, rainbow squares, Grandma’s squares, peanut butter squares, Christmas jumbles, and stained glass windows (not to be confused with stained glass Christmas cookies). It’s popular at weddings, potlucks, and funerals.
Yes, absolutely. As you make the peanut butter marshmallow squares in a square bowl, you can cut them into 3 rows of 3, 4 rows of 4, or 5 rows of 5 – whatever size you want them to be.
Nearly all marshmallow brands are gluten-free, including Kraft, Savion and Doumak, but check the label to make sure. Hershey’s butterscotch chips are gluten-free, as are some other brands, which would work in the butterscotch squares.
Best Confetti Square Recipe
Confetti Squares
Equipment
- Baking Dish 9-Inch Square
Ingredients
- 1 ⅓ Cups butterscotch chips
- 1 ¼ Cups peanut butter, smooth
- 6 Tablespoons salted butter
- 2 Teaspoons vanilla extract
- ½ Teaspoon salt
- 14 Ounces mini marshmallows, rainbow colored
Instructions
- Prepare a 9-inch square pan by lining with parchment paper and spraying lightly with oil.
- In a saucepan, combine the butterscotch chips with the peanut butter and butter. Heat over medium-low, stirring constantly until the butterscotch chips have melted and the mixture is smooth.
- Add the salt and vanilla, mix to combine.
- Set about 1 cup of the marshmallows aside, then add the remaining marshmallows to the butterscotch mixture and fold to combine. Make sure the mixture is cool enough not to melt the marshmallows but warm enough to stir easily.
- Press the mixture into the prepared baking dish firmly.
- Cover the top with the cup of reserved marshmallows, gently pat them down to ensure they stick to the bars.
- Let chill in the refrigerator for at least 1 hour or until solid.
- Cut into squares before serving. Store in an airtight container in the fridge for up to 1 week.
Notes
Adding the marshmallows: Make sure the mixture is cool enough not to melt the marshmallows but warm enough to stir easily. Be quick here – you don’t want the mixture to cool too much, and set before you mix in the marshmallows!
Make extra: These always disappear too fast!
Nutrition
Butterscotch confetti squares are a delicious and easy dessert made with butterscotch chips, peanut butter, mini marshmallows, and more. No baking is involved, and the combination of melted butterscotch chips, peanut butter, and more make these perfect for a special occasion.
Other Recipes to Try
- This creamy Chocolate Peanut Butter Pie is a peanut butter lover’s paradise.
- Strawberry Lemonade Bars are the perfect balance of sweet and tart.
- This collection of easy Peanut Butter Recipes is way too good to miss!
- Pumpkin Chocolate Chip Bars are the ultimate fall treat.
- A Salted Butterscotch White Russian is one of the most delicious cocktails!
Bella Bucchiotti
Bella Bucchiotti is a Canadian-based syndicated food, travel, and lifestyle writer, photographer, and creator at xoxoBella. She founded xoxoBella in 2015, where she shares her love for food, dogs, sustainability, fitness, crafts, outdoor adventures, travel, and philanthropy to encourage others to run the extra mile, try new recipes, visit unfamiliar places, and stand for a cause. Bella creates stress-free and family-friendly recipes for weeknight dinners and festive feasts.
So easy to make, and the sweet peanut butter combo is addictive!
It’s so flavorful and easy to make! I cook it all the time, and my family loves it.
This was a flavor explosion. Absolutely amazing! 🙂
My kids totally enjoyed it. It’s so good!
Also love how this recipe turns out. I make them often.
I make this recipe every year! So good!