Confetti Squares - Peanut Butter Marshmallow Squares (2024)

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Published By Fiona

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Confetti squares are one of those amazing retro desserts that are completely delicious, completely insane, and way too easy to make. They’re also known as peanut butter marshmallow squares or butterscotch marshmallow squares – and they’re basically a fluffy cloud of sweet peanut butter deliciousness.Confetti Squares - Peanut Butter Marshmallow Squares (1)

**This post was originally published May 27, 2017 and updated December 17, 2019**

Confetti Squares – AKA Peanut Butter Marshmallow Squares

I always remember my grandmother making confetti squares. They’re simple to make, extremely sugary, and have a chewy, gooey texture that reminds me of childhood. They’re one of those desserts that you’re almost embarrassed to make because they’re so sugary – but they’re still one of my all-time favorite treats.

The recipe is super simple and there are only 4 ingredients.

  1. ¼ cup butter
  2. 1 cup peanut butter
  3. 1 bag butterscotch chips
  4. 4-5 cups rainbow marshmallows

Confetti Squares - Peanut Butter Marshmallow Squares (2)

You could obviously use regular marshmallows, but the rainbow variety are what give confetti squares their name. Plus – seeing a bag of multicolored marshmallows makes me nostalgic in the best possible way.

The flavor is similar to scotcheroos (hence why they’re sometimes called peanut butter marshmallow squares or butterscotch marshmallow squares), but they’re soft and chewy instead of crunchy. Then the marshmallows make them even sweeter.

Confetti Squares - Peanut Butter Marshmallow Squares (3)

How to Make Confetti Squares

To make confetti squares we melt together the butter, peanut butter, and butterscotch chips over low heat in a saucepan. You’ll want to go slowly here so it melts into a smooth and creamy sauce without any lumps. You could also melt them together in the microwave on medium power for 45-second intervals, stirring between each interval.

Then remove from the heat and allow the mixture to cool. This is absolutely necessary, otherwise, if you mix in the marshmallows while the peanut butter is still hot you’ll melt the marshmallows and end up with a big sticky mess.

Pro Tip:For extra gooey squares – use 4 cups mini marshmallows instead of 5 cups.

After the marshmallows are stirred in, the batter is spooned into our prepared pan, and we chill in the fridge to let the bars harden.

Confetti Squares - Peanut Butter Marshmallow Squares (4)

Sweet, peanut butter butterscotch marshmallow perfection. If you remember confetti squares from your childhood – then you know how delicious these are! And if you’ve never tried confetti squares before, then you definitely need to try this super easy no-bake recipe!

If you love confetti squares, make sure to try these other easy, no bake treats:

  • Rocky Road Bars
  • Chocolate Confetti Squares
  • No Bake Peanut Butter Bars

Confetti Squares - Peanut Butter Marshmallow Squares (5)

Print Recipe

4.72 from 7 votes

Confetti Squares - AKA Peanut Butter Marshmallow Squares

Confetti squares are a super easy, 4 ingredient, no bake recipe. Also known as peanut butter marshmallow squares - these are soft, chewy, peanut butter-y and deliciously sweet!

Course: Dessert

Cuisine: Canadian

Keyword: 8x8, Peanut Butter Marshmallow Squares

Servings: 16 squares

Calories: 160kcal

Author: Fiona Dowling

Ingredients

  • ¼ cup unsalted butter
  • 1 cup peanut butter
  • 1 bag butterscotch chips , 300g
  • 4-5 cup rainbow marshmallows

US Customary - Metric

Instructions

  • Line an 8x8 or 9x9 inch pan with aluminium foil and lightly grease.

  • In a medium saucepan over low heat melt together the butter, peanut butter & butterscotch chips.

  • Stir occasionally until the mixture is smooth.

  • Remove from the heat and allow to cool to room temperature.

  • Stir in the marshmallows.

  • Pour the batter into the prepared pan and set in the fridge to harden (about 1-2 hours).

Notes

Store bars in an airtight container in the fridge for up to 5 days. Bars can be frozen for up to 2 months, then thaw overnight in the fridge.

Nutrition

Calories: 160kcal | Carbohydrates: 13g | Protein: 4g | Fat: 11g | Saturated Fat: 4g | Cholesterol: 8mg | Sodium: 85mg | Potassium: 105mg | Fiber: 1g | Sugar: 9g | Vitamin A: 89IU | Calcium: 8mg | Iron: 1mg

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Confetti Squares - Peanut Butter Marshmallow Squares (10)

About Fiona

I'm the baker and blogger behind Just So Tasty! I believe anyone can make tasty, homemade desserts and treats. I love classic recipes that are delicious (obviously), not too fussy, and use simple, everyday ingredients.

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Comments

  1. Confetti Squares - Peanut Butter Marshmallow Squares (11)Mandy

    Was so sad when my little one was diagnosed with a peanut allergy. These were a favorite of mine growing up. I had a craving today so decided to recreate with sunflower butter instead of peanut butter. Not exactly the same but they sure hit the spot!

    Reply

    • Confetti Squares - Peanut Butter Marshmallow Squares (12)Fiona

      I’m glad you were still able to enjoy them!

      Reply

    • Confetti Squares - Peanut Butter Marshmallow Squares (13)Jay

      You should try to find “Wow Butter”, nut free.

      Reply

      • Confetti Squares - Peanut Butter Marshmallow Squares (14)Patty

        Agreed! This is how I make them for our family when my adult step son is around (who has a peanut allergy). Even he enjoys them!!

        Reply

      • Confetti Squares - Peanut Butter Marshmallow Squares (15)Donna Thompson

        Can almond butter be substituted for the peanut butter. Peanut allergy.

        Reply

        • Confetti Squares - Peanut Butter Marshmallow Squares (16)Fiona

          That would be fine. Just be sure to really stir the almond butter beforehand. I’d recommend using an almond butter where the oil doesn’t sit on the top. Otherwise, the bars may not set properly.

          Reply

  2. Confetti Squares - Peanut Butter Marshmallow Squares (17)Karen

    Can I freeze these and if not how long can they be in the fridge?

    Reply

    • Confetti Squares - Peanut Butter Marshmallow Squares (18)Fiona

      You can definitely freeze them. They’ll also last for up to 2 weeks in the fridge in an airtight container.

      Reply

  3. Confetti Squares - Peanut Butter Marshmallow Squares (19)Patty

    Confetti Squares - Peanut Butter Marshmallow Squares (20)
    Tried these tonight with salted caramel chips as the store was out of butterscotch. Fingers crossed they will be tasty!

    Reply

  4. Confetti Squares - Peanut Butter Marshmallow Squares (21)Paul Fleckenstein

    The only colored marshmallows I can find are fruit-flavored. Is that what you use?

    Reply

    • Confetti Squares - Peanut Butter Marshmallow Squares (22)Fiona

      I typically use the non fruit flavored ones. They will still “work” per say, but I prefer non flavored ones

      Reply

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Confetti Squares - Peanut Butter Marshmallow Squares (2024)

FAQs

Why are my peanut butter marshmallow squares crumbly? ›

If your confetti squares are grainy and crumbly instead of smooth and creamy, it's because the peanut butter, butter, and butterscotch mixture got too hot and the sugars crystalized. Make sure to heat everything slowly to prevent this.

How many carbs are in peanut butter marshmallow squares? ›

Nutrition Facts
NutrientValue%DV
Carbs20g7%
Net carbs20g
Fiber1g3%
Sugar8g
83 more rows

Can marshmallow squares be frozen? ›

They can also be frozen.

How do you fix crumbly peanut butter fudge? ›

To fix oily, hard or grainy fudge, scoop the fudge back into a pot with about a cup of water. Cook it over low heat until the fudge dissolves. Then bring the fudge back up to the temperature specified in the recipe and follow the remaining steps. The flavor may be slightly diluted, but the texture will be improved.

How do you fix crumbly peanut butter? ›

If you're down to the bottom of a jar and the nut butter is dry and crumbly (you didn't store it upside down, huh?), a surefire way to give it life is by adding some oil.

Do pink marshmallows taste different? ›

Manhattan Pink & White Marshmallows : 4.5/10

Some comments tasters noted on the flavour variations: “The pink tastes like strawberry while the white is more indistinguishable,” and “Pink tasted like strawberries and white had a more custard vanilla flavour to it,” and “The pink one has a 'softer' flavour…

Is marshmallow fluff high in sugar? ›

EWG calculates that this product is 50% sugar b...

Are marshmallows good carbs? ›

Carbs in Marshmallows

A single serving of marshmallows provides about 23 grams of carbohydrate, primarily in the form of added sugar. The glycemic index of marshmallows is estimated to be about 62, making it a high glycemic food. But the estimated glycemic load of a marshmallow is just 15, which is fairly low.

Why can't you freeze marshmallows? ›

The reason it doesn't freeze completely solid is due to its high sugar content. A higher sugar content lowers the freezing point of liquids, thus making it harder to freeze.

How long are marshmallow squares good for? ›

Rice Krispies marshmallow treats can be stored at room temperature in an airtight container for up to two days. To keep them longer, try storing rice crispy treats in your freezer for up to six weeks.

Should you freeze Rice Krispie Treats? ›

If you want to store them for longer than two days, try freezing them. To Freeze: Allow these gooey Rice Krispie Treats to cool completely and cut them into squares. Freeze in an airtight container, or wrap each square in a piece of plastic wrap and place them in a gallon freezer bag. Freeze them for up to 3 months.

Why is my peanut butter dough crumbly? ›

Not enough fat

To fix this, you can add more fat to the dough. This can be in the form of butter, shortening, or even olive oil. Just add a little at a time until the dough comes together and is no longer crumbly. You may also need to add more liquid, such as milk or water, to get the right consistency.

Why is my marshmallow grainy? ›

What type of sugar you use to make marshmallows will affect the overall texture. The idea is to prevent the sugar from crystallising in a well-ordered structure, as this will make the marshmallow grainy and crunchy.

How to keep peanut butter cookies from crumbling? ›

Add more liquid ingredients in small amounts. Milk, egg yolks or egg whites, vanilla extract or even a teaspoon of water can help moisten the dough to give you less crumbly cookies. A little bit of a liquid like milk can also help your cookies spread in the oven to give you a more crispy cookie.

Why is my peanut butter dry and crumbly? ›

Since oil and water don't mix, and peanut butter has a high oil content, there isn't much room in the mixture left over for water, explains Live Science. This can lead to naturally dry peanut butter, drying out more quickly due to its limited water content.

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