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Easy Peanut Butter Marshmallow Squares

These classic Butterscotch Peanut Butter Butterscotch Marshmallow Squares are one of my favourite nostalgic childhood treats. Creamy peanut butter and butterscotch chips mixed in with rainbow coloured marshmallows are truly a match made in heaven!

best ever peanut butter butterscotch squares

These No Bake Peanut Butter Marshmallow Squares are from my repertoire of my Grandma Yvette’s recipes, she was the baking and cooking queen! Having treats ready for company at any time was really common in my grandma’s house. 

If you stopped by there would always be a fresh batch of her famous Chocolate Chip Cookies, her mouth watering Gluten Free Lemon Poppyseed Muffins, her amazing 5 Ingredient Peanut Butter Balls or her Peanut Butter Butterscotch Marshmallow Squares!

I’m actually not the biggest fan of butterscotch. But when it comes to these bars, I AM OBSESSED.

easy no bake peanut butter marshmallow square recipe

I’m convinced it has something to do with the salt in the peanut butter, which makes the butterscotch less sweet and butterscotch-y. Instead all I taste is creamy, marshmallow goodness!

This recipe goes by a lot of different names. Peanut butter marshmallow bars, confetti squares, no bake goodie bars, etc.

Whatever you choose to call them, they are extremely popular to make for the holidays!

5 ingredient peanut butter butterscotch marshmallow barsIngredients for the Easy No Bake Squares

Peanut Butter (Creamy or Crunchy) – for this recipe my grandmother used to always use creamy peanut butter. Whether you are using natural peanut butter, unsalted peanut butter, crunchy peanut butter, organic peanut butter or good old fashioned jif peanut butter. 

Butterscotch Chips – I typically use the Chipits butterscotch chips. There are lower sugar options like Lilys butterscotch candies, and I’m sure you could also find vegan butterscotch chips as well! Some individuals who have tested out this recipe have also substituted some of the butterscotch chips for regular chocolate chips to cut down the sweetness. 

Butter – my grandmother always used regular old fashioned butter. You could try this recipe using vegan butter as well if you like or if you’re sensitive to dairy. 

Rainbow Coloured Miniature Marshmallows – colored marshmallows recipes have to be the best recipes around. You are more than welcome to use regular mini white marshmallows for this recipe, but it might not be as fun! Fun fact – sometimes I wonder how many mini marshmallows are in a bag.

Vanilla – vanilla extract, because it just adds a little something something to marshmallow dessert recipes!

easy peanut butter confetti bar recipe

Kitchen Tools Required

How To Make

  1. In a large pot over medium-low heat, combine the butterscotch chips, peanut butter and butter. Stir frequently until the mixture is completely melted.
  2. Let cool, and fold in marshmallows and vanilla quickly. I like to throw my marshmallows in the freezer for 10 minutes before this step to prevent them from melting all together.
  3. Pour the mixture into a lined 8×8 or 9×9 inch pan and spread evenly. Refrigerate for 1 hour minimum to set, then cut into bars. Store in refrigerator or freezer (I actually prefer mine straight from the freezer).

marshmallow fudge dessert recipe

Tips for the Best Butterscotch Peanut Butter Marshmallow Squares

Typically before I start making the recipe I throw the bag of marshmallows in the freezer. This way the marshmallows don’t melt when the peanut butter mixture is still slightly warm and hits them.

Not only does refrigerating them help them firm up faster so you can eat them faster, but these squares taste way better cold. The creamy peanut butter base with the cold marshmallows is just a match made in heaven!

Believe it or not, these are even BETTER when they are frozen.

I like using crunchy peanut butter for this recipe because it gives the bars a nice crunch. Also ensure to use a tasty peanut butter, preferably a salted one for this recipe!

The combo of the salt from the peanut butter and sweetness from the butterscotch chips is amazing.

It’s a quick recipe that comes together within 5 minutes and probably takes about an hour to set before you can cut them into bars. But you can speed up the cooling time by sticking the bars in the fridge!

Or if you live in a cold climate like me, stick them outside or on your porch, which acts as a second fridge all winter season.

best ever 5 ingredient peanut butter marshmallow recipe

Other Delicious Easy Treats You May Want To Try!

Note: This post may contain affiliate links, so you can conveniently find the ingredients you need to make the peanut butter confetti squares.

Yield: 20 pieces

No Bake Peanut Butter Marshmallow Squares

No Bake Peanut Butter Marshmallow Squares

These classic Butterscotch Peanut Butter Butterscotch Marshmallow Squares are one of my favourite nostalgic childhood treats. Creamy peanut butter and butterscotch chips mixed in with rainbow coloured marshmallows are truly a match made in heaven!

Prep Time 15 minutes
Chill Time 1 hour
Total Time 1 hour 15 minutes


  • 1 package butterscotch chips, 300g package (I used Chipits)
  • 1 cup crunchy or creamy peanut butter
  • 1/2 cup butter
  • 1 package rainbow miniature marshmallows, 250g package
  • 1 tsp vanilla


  1. Put bag of marshmallows in the freezer and line an 8×8 pan with parchment paper.
  2. Melt butterscotch chips, peanut butter, and butter, peanut butter over low heat, stirring until smooth. Remove from heat, and let cool to ensure the marshmallows don't melt in next step.
  3. Quickly fold in vanilla and marshmallows.
  4. Spread mixture into 8×8 or 9x9 inch pan and gently spread with a spatula or spoon.
  5. Refrigerate until firm. Approximately 1 hour.
  6. Remove from pan and slice into squares. Store squares in refrigerator or freezer.

Nutrition Information:



Serving Size:

1 grams

Amount Per Serving: Unsaturated Fat: 0g

Did you make this recipe?

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About Bailey

I love to bake, cook, exercise, and document all of the above. Nutrition is not low fat. It is not low calorie. It’s not feeling deprived or being hungry all the time. It’s nourishing your body with real, whole foods so that you are consistently satisfied and energized to live your life to the fullest! Read more…

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  1. So delicious!!! My mom use to make these. Reminds me of Home. Thank you!! 💞💞🫂

    1. Hi Joanne,

      They are so nostalgic for me as well because my grandmother used to make them for us all the time! Thanks so much for the 5 star review! 🙂

  2. Easy recipe and now my new favourite dessert! Thanks for sharing this recipe.

    1. Hi Eileen,

      Thank you so much for the 5 star review and I’m so happy to hear you loved them!!

  3. Can the butter be omitted

    1. Hi Elsie!

      No it cannot. You could use vegan butter as a replacement if you like! I haven’t tested with coconut oil or anything else! Happy baking!! 🙂

  4. I used chocolate chips with the butterscotch chipits. It cuts down on the sweetness. Also added slivered almonds and rice crispiest for that extra crunch. Taste amazing.

    1. Hi Katherine, thank you so much for the 5 star review! That sounds amazing! So glad you enjoyed them!!

  5. I seriously cannot get over these!! They bring me right back to my childhood. My nana made these for me when I was growing up and I always wished I got the recipe from her… so thank you so much!!!

    1. Hi Jenna, I’m so happy to hear that! They remind me so much of my grandmother as well! Happy baking! 🙂

  6. Word to the wise: if you double the recipe, don’t double the marshmallows as well…woops.

    1. Yes you do have to double the marshmallows otherwise the filling gets too sweet. Having said that…to each their own.

  7. Julie Vanderaegenbupcha @ shaw.ca says:

    Can you use Carmel chips..thanks…

    1. Hi Julie, yes you could, however it will yield a completely different flavour. The difference between caramel and butterscotch is that caramel is made with white sugar, but butterscotch is always made with brown sugar. The recipe will stay resemble the same and hold up great it just won’t taste the same!

  8. Delicious and easy! Just like my husbands mom used to make. Needed to make a third batch before Christmas!!!!

    1. Hi Janelle!

      I can relate they are always a favourite around Christmas time!! Thank you so much for the 5 star review!!

    2. Can you add coconut and if so how much would you recommend

  9. Had these.when I was at a camp job, 1st time making them at home. Delicious. Thank you for sharing your recipe. East straight forward.

    1. Hi Yvonne,

      You’re so welcome! So glad you enjoyed!! 🙂

  10. Christine says:

    Do you recommend using salted or unsalted butter? I’m excited to make these! Thank you. 😊

    1. Hi Christine,

      Either or will work just fine! I typically use salted! 🙂

  11. Hi Bailey,
    Thank you for sharing your recipe.
    Ive been making this peanut butter square but i just learned from you about the marshmallow!! Thank you. I never thought about that at all!
    No wonder that my marshmallows are kinda melting sometimes specially if i am so excited to mixed it all together 😂.
    Sometimes, if i am being patient and wait until it cool down then add up the marshmallows then i will not fail it.
    But doing ur recipe just now, 2 mins ago is just a solution of my stupidity . 😂
    Thanks a lot.. now i know…

    1. So happy to hear that!! So glad I could help!! 🙂

  12. Hi Bailey! Sorry might be a stupid question but should the butter be softened for this recipe?

    1. Hi Kaitlyn,

      Not a stupid question!! It doesn’t matter as you are melting everything anyways, so you can use softened or straight out of the fridge! 🙂

  13. Although this is traditionally an Xmas treat, I always keep a tray on hand in the freezer. I have made this a hundred times. Simple , no fail and GF. My boys are mad for this treat. Once it sets I cut it in squares in the tray and move it all to a zip lock bag along with the parchment lining to the freezer. Pieces only take minutes to thaw but the whole tray is a great send along treat when guesting (or pull out when the guys are over). The one thing I have found: I have made this in canada and in the US. US ingredients are WAY sweeter and makes the treat too sweet. I will work on a less sweet American version this winter.