Easy Butterscotch Peanut Butter Confetti Squares Recipe

As much as I love trying new and different foods and recipes, there’s just no beating a classic.

And in our house, peanut butter has always been a classic choice for my recipes, whether I’m making a simple batch of peanut butter cookies or a savoury Thai Peanut Beef recipe.


So, when I recently decided I was in a peanut butter mood, choosing just one recipe to make was no easy job!

But I was feeling nostalgic and craving something sweet, so I decided to make my very favourite easy Confetti Squares recipe featuring butterscotch chips and peanut butter!

I’ve always loved the flavor of butterscotch, but making it traditionally is a potentially tricky process that involves cooking butter, brown sugar, and corn syrup until thick.

Butterscotch chips make enjoying the flavor of butterscotch so much easier, and the taste is even better combined with creamy peanut butter.

peanut butter confetti squares

That’s why, in my opinion, every bite of these smooth, dreamy butterscotch and peanut butter squares studded with rainbow marshmallows is pure bliss.

And when I was a child, they were the treat I was most excited to have when I went to my best friend’s house (since my own mom didn’t make them).

Of course, it didn’t take me long to learn to make these practically-foolproof squares myself.

While I started out mixing nothing but marshmallows into my squares, I soon learned that just a half-cup or so of Rice Krispies made the squares even better. If you’ve made these before but haven’t ever added Rice Krispies, do it now!

But even if you make this Butterscotch Confetti Squares recipe in its most classic form, you’ll be amazed by how delicious four simple ingredients can be when they’re combined.

What Are the Ingredients in Confetti Squares?

Like most easy recipes, there’s no long list of ingredients when making these squares. All you’ll need is:

  • Butter or margarine
  • Peanut butter
  • Butterscotch chips
  • Rainbow marshmallows

What Else Can I Add To Butterscotch Confetti Squares?

One of the best things about Butterscotch Confetti Squares is that they’re easy to customize with all kinds of different mix-ins. Some of my personal favourites are:

  • Rice Krispies
  • Coconut
  • Crushed Potato Chips
  • Graham Cracker Crumbs

Convinced you need to make this right now? You’re going to love how easy these tasty squares are!

butterscotch marshmallow squares

Confetti squares are one of those recipes that take virtually no skill to make. Heat the butter and peanut butter, then melt butterscotch chips into the two butters, mix well, and add marshmallows.

Just make sure that the melted butterscotch mixture isn’t too hot when you stir in your marshmallows to avoid accidentally melting them.

And, of course, make sure to wait until the squares are completely cooled before cutting!

This is one of the hardest parts of making butterscotch confetti squares as far as I’m concerned, so I’ll often pop the tray into the freezer so that the squares set quicker and I can dig in!

Looking for another great peanut butter recipe? Try my easy Chocolate Peanut Butter Squares for even more tasty peanut butter goodness.

With just a few minutes, a few ingredients and that trusty jar of peanut butter, you can create all kinds of irresistible goodies!

peanut butter confetti squares
peanut butter confetti squares

Butterscotch Confetti Squares

Yield: 40
Prep Time: 5 minutes
Cooling Time: 2 hours
Total Time: 2 hours 5 minutes

These butterscotch and peanut butter marshmallow squares are a childhood favourite that couldn't be easier to make. Confetti squares take just four or five ingredients and a few minutes of preparation time to whip up!


  • 1 cup peanut butter
  • 1/2 cup butter
  • 1 bag butterscotch chips
  • 1 250g bag coloured mini marshmallows
  • 1/2 cup Rice Krispies cereal, optional


  1. In large pot or large microwave-safe bowl, melt peanut butter and butter together over medium-low heat to medium heat, stirring with wooden spoon until smooth and blended.
  1. Add butterscotch chips and stir until chips are melted.
  2. Let cool for 2-3 minutes, or longer if needed, and gently stir in marshmallows.
  3. Add Rice Krispies or other add-ins, if using, and mix well.
  4. Spread or press mixture into 9x13" baking pan lined with parchment paper or greased aluminum foil.
  5. Cool in refrigerator until firm and cut into squares

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Nutrition Information:
Yield: 40 Serving Size: 40 Servings
Amount Per Serving: Calories: 102Total Fat: 7gSaturated Fat: 3gTrans Fat: 0gUnsaturated Fat: 3gCholesterol: 6mgSodium: 60mgCarbohydrates: 10gFiber: 0gSugar: 7gProtein: 2g

Questions and Answers:

My marshmallows keep melting, what should I do?

If you have issues with melted marshmallows, consider melting the butter, peanut butter, and butterscotch chips as directed above in a medium saucepan, and then letting it cool for at least 10 minutes. Place marshmallows in a large bowl and pour the melted peanut butter mixture overtop once it’s cooled to almost room temperature.

Can I make this in a 9×9″ square baking pan instead? 

Absolutely! If you prefer taller squares, then you can use a smaller square baking dish instead of the larger 9×13″ baking pan. Keep in mind it will need to chill longer to set.

​When should I add dry ingredients like crushed potato chips, Rice Krispies, or graham crumbs?

I find that the best time to add any dry ingredients to these squares is right at the end, after the marshmallows and butterscotch mixture have been combined. Add 1/2 cup to 1 cup of your favorite add-in to the marshmallow mixture and stir until combined, then spread it in the prepared pan.

Can I add multiple dry ingredients to confetti squares?

Definitely! Just mix your add-ins together well in a medium bowl before adding to the butterscotch marshmallow mixture?

Can I use crunchy peanut butter instead of smooth peanut butter?

​Yes! Both crunchy peanut butter and smooth peanut butter work interchangeably in these peanut butter marshmallow bars, so use whichever one you prefer.

47 thoughts on “Easy Butterscotch Peanut Butter Confetti Squares Recipe”

  1. It’s shocking but I only make these at Christmas because I just can’t resist if they are in the house.

  2. Loving the mix and Colors, Kids will Love these, Had to Share to my site so Other Mothers and kids can try Great Idea.

  3. I am actually not a fan of these at all but all of my kids beg me to make them a tray at Christmas! By the time I went to shop for the rainbow marshmallows last December I couldn’t find them in stock anywhere so this year I bought them early!

    1. Haha Lori! My mom was also not a fan, but she did make some other pretty amazing treats, so we never hassled her about it. Getting the marshmallows in advance is a good idea; I always stock up on holiday baking supplies early because my favourite stores seem to always be out of at least one key ingredient I need!

        1. You know, I don’t like coloured marshmallows in anything else; I actually think they’re super gross in general. Lol But for some reason in these, I can’t get enough of them!

    1. My mother-in-law does my favourite haystack cookies with chocolate chips and peanut butter, but I’ve never thought of using chocolate for these! I may have to give it a try. :)

    1. Definitely need to do over lower heat and let cool longer than 2-3 minutes as even then my marshmallows melted. Much disappointment with this recipe

      1. Sorry to hear that, Catherine! I actually take the pan off the heat before stirring in the butterscotch chips, which generally cools the mixture enough that it only needs a few more minutes of cooling time, which I see I didn’t make clear in the directions. And yes, you definitely have to use your own judgement on whether or not it’s cool enough! I’ve sometimes ended up with half-melted marshmallows because I get impatient. :)

      2. I take the pot off the heat and wait until the bottom of the pot is cool enough to touch with my whole hand! That’s when I mix in my marshmallows.

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