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Peanut Butter Marshmallow Squares

Marshmallow Peanut Butter Squares

These peanut butter marshmallow squares prove that a genuinely satisfying treat can come together with nothing more than a saucepan, a mixing bowl, and a few pantry staples. This no bake butterscotch bars recipe relies on gentle melting and proper chilling to avoid the melted marshmallow soup that ruins so many other no-bake bar attempts. Whether served at a potluck or sliced for a late-night couch session, these no bake butterscotch peanut butter squares for a crowd earn a permanent spot in the regular rotation.
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Prep Time 5 minutes
Total Time 1 hour 35 minutes
Servings: 16 servings
Course: Dessert
Cuisine: American
Calories: 280
Ingredients Equipment Method Notes

Ingredients
  

  • 1/2 cup unsalted butter
  • 1 cup creamy peanut butter (Peter Pan brand used)
  • 11 ounces butterscotch chips (Nestle Toll House brand used)
  • 1 teaspoon vanilla extract
  • 10 ounces fruity-flavored mini marshmallows (Jet-Puffed brand used)

Equipment

  • 8x8 baking pan
  • Medium saucepan
  • Parchment paper

Method
 

  1. Line a 8x8 straight-sided baking pan with parchment paper, leaving enough to overhang the sides, then lightly spray with non-stick baker’s spray. This helps to remove the chilled squares from the pan when ready to slice.
  2. In a 3 ½ to 4 quart saucepan, over medium-low heat, add the unsalted butter, creamy peanut butter, and butterscotch chips. Stir until melted and smooth.
  3. Stir in the vanilla extract and remove from the heat and allow the mixture to cool for 2 to 3 minutes to ensure the marshmallows don’t melt when mixed in.
  4. Add the mini marshmallows to a large mixing bowl, pour the slightly cooled peanut butter mixture over the marshmallows and gently fold to combine until all the mini-marshmallows are evenly coated.
  5. Transfer the mixture to the prepared pan and spread into an even layer.
  6. Chill for 1 ½ to 2 hours or until completely firm.
  7. Gently lift the peanut butter bars from the pan using the overhanging parchment paper and place onto a large cutting board.
  8. Slice into 16 squares using a large sharp knife. You can run the knife under hot water and wipe clean between slices for smooth cuts.

Recipe Notes

  • Use fruity-flavored mini marshmallows, or substitute plain white mini marshmallows if preferred.
  • Use regular creamy peanut butter such as Jif, Peter Pan, or Skippy. Avoid natural or flavored peanut butter, as it can change the texture and flavor.