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Posted by on Apr 29, 2015 in Desserts, No-Bake, Recipes, Squares | 7 comments

Peanut Butter Marshmallow Squares

Peanut Butter Marshmallow Squares

This is crack. Marshmallow crack to be exact. Its official name is “Butterscotch Confetti”, but anyone who doesn’t read Jean Paré’s Company’s Coming cookbooks refers to them as “Peanut Butter Marshmallow Squares”.

Either works for me.

In fact, we could call it dirt and I’d still eat it.

peanut butter marshmallow squares

Not only are these squares completely addictive, they are also ridiculously easy. They are gluten free, no bake, kid-friendly and guaranteed to be a crowd pleaser. With just four ingredients, how can you go wrong?

The original recipe calls for melting the butterscotch chips, butter and peanut butter in a pot on the stove, but lately I’ve just been putting those all in a big bowl and microwaving until just melted. It’s such a time saver – you can thank me later.

The key is to make sure that the butterscotch mixture cools to lukewarm before you add your marshmallows, otherwise they’ll all melt. I’m sure that would taste equally delicious, but it might lose some of the visual appeal. Also, don’t do this with white marshmallows. You definitely need the coloured ones for this recipe.

And if you lick the pan clean, welcome to the club.

To start with, you probably need a cute assistant. Cute assistants make everything taste better.

Butterscotch Confetti

See? These are guaranteed to be extra special peanut butter marshmallow squares.

Butterscotch Confetti

Place the peanut butter, butter and butterscotch chips in a large saucepan and melt over low heat.

Butterscotch Confetti

Stir constantly. Your cute assistant can help with this one. This will help the mixture melt more quickly without getting over-heated.

Butterscotch Confetti

Once it’s melted and smooth, remove from heat and cool to lukewarm.

Butterscotch Confetti

Add coloured marshmallows.

Butterscotch Confetti

Stir to combine.

Butterscotch Confetti

Transfer mixture to a greased square cake pan.

Butterscotch Confetti

Grease a piece of waxed paper and place greased-side-down over mixture.

Butterscotch Confetti

Press down firmly.

Butterscotch Confetti

Remove wax paper. Voila!

Butterscotch Confetti

Chill until firm and cut into squares.

Butterscotch Confetti

Try not to eat the whole pan.

Butterscotch Confetti

But if you do, at least you can whip up another batch in a few minutes, right?

Butterscotch Confetti

Mmm…marshmallow crack.

Butterscotch Confetti

Recipe from Jean Paré’s 150 Delicious Squares cookbook.

Butterscotch Confetti


Yield: 16 squares

  • 1 cup butterscotch chips
  • ½ cup smooth peanut butter
  • ¼ cup butter
  • 9 oz (250g) bag of miniature coloured marshmallows
  1. Grease an 8 inch square pan and set aside.
  2. Combine butterscotch chips, peanut butter and butter in a large saucepan and heat on low. Stir constantly until chips are almost melted. Remove from heat and stir until smooth.
  3. Let stand for about 15 minutes, until mixture is lukewarm.
  4. Add marshmallows and stir until coated.
  5. Grease a piece of wax paper and use it to press the mixture firmly into prepared pan. Chill until firm. Cut and serve.
To save time: microwave the butter, peanut butter and butterscotch chips in 30 second increments, stirring after each time. Once chips are almost melted, remove from microwave and stir until smooth. Cool to lukewarm and add marshmallows.


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  1. Hi there! I was going to make these peanut butter marshmallow squares but I have no butterscotch chips. Could I increase the peanut butter instead? Thanks!

    Tammy Bennett

    • Hi Tammy,

      This one stumped me for a little bit…I had to go brainstorm with my friend Leanne to come up with an answer! We both agreed that using only peanut butter wouldn’t set. The sugar in the butterscotch chips helps firm up the squares. Leanne’s suggestion was that you could try adding some icing/confectioner’s sugar (maybe a tablespoon or so) and see if that helps. We’re not guaranteeing anything, but if it works let us know!

      Happy cooking!

  2. Thanks so much for your help! If I can’t find butterscotch chips at store I will try your suggestion and will let you know how they turn out! Thanks so much!


    • You can use any other kind of chips, chocolate, white etc

      • Hi Cheryl,

        You’re right! Switching up the chips will change the flavour, but sometimes that’s exactly what you want! :)

    • I dislike butterscotch chips. They always leave a bad aftertaste in my mouth, so I sub them with Reeses peanut butter chips. Oh my!!!! A little slice of peanut butter heaven :)

      • Well that sounds so delicious, too! Happy cooking! xo

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