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+ servings
Close up of seven marshmallow squares. three are tilted to the side, to expose the colourful marshmallows inside.

Peanut Butter Marshmallow Squares

A classic, retro no-bake dessert made with peanut butter, butterscotch chips and marshmallows. 
Course Dessert
Cuisine American
Keyword mini marshmallows, peanut butter
Total Time 15 minutes
Servings 16 squares


  • 1/4 cup butter
  • 1/2 cup peanut butter
  • 1 270 g bag butterscotch chips
  • 1 250 g bag mini marshmallows coloured/flavoured mini marshmallows


  • Grease an 8x8 baking pan with butter and set aside.
  • In a medium saucepan set over low heat*, melt the butter and peanut butter together. You do not want this mixture to get hot, just warm enough to melt the two ingredients together. Remove from the heat.
  • Add in the butterscotch chips, and mix until all the chips have melted. Sometimes I will put the pot back on the element (heat still turned off) and just use the residual heat to help the process. Mix in the marshmallows and work quickly to coat them completely. Transfer the mixture into the prepared 8x8 pan and gently press it into the pan so it's evenly distributed.
  • Cover with plastic and chill in the fridge until firm.
  • Cut into squares and enjoy.


  • If your bag of marshmallows is closer to 400 grams, double the butter and peanut butter recommended in this recipe.  Mini marshmallows come in different size bags. The kind I use are on the small side (250 grams).
  • You can use a microwave if you like, just watch it carefully so it's not too hot.