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Peanut Butter Marshmallow Squares Recipe


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3.9 from 88 reviews

  • Author: Ava
  • Total Time: 1 hour 35 minutes
  • Yield: 16 servings

Description

Peanut Butter Marshmallow Squares are a no-bake, chewy, and sweet treat combining creamy peanut butter, butterscotch chips, and fruity mini marshmallows. Perfect for parties or a fun snack, these bars are easy to prepare and require chilling to set for a firm yet tender texture.


Ingredients

Ingredients

  • ½ cup unsalted butter
  • 1 cup creamy peanut butter (Peter Pan brand used)
  • 11 ounce bag butterscotch chips (Nestle Toll House brand used)
  • 1 teaspoon vanilla extract
  • 10 ounce bag fruity-flavored mini marshmallows (Jet-Puffed brand used)


Instructions

  1. Prepare the Pan: Line an 8×8-inch straight-sided baking pan with parchment paper, allowing enough overhang on the sides to lift the bars out later. Lightly spray the parchment with non-stick baker’s spray to ensure easy removal.
  2. Melt Ingredients: In a 3½ to 4-quart saucepan over medium-low heat, combine the unsalted butter, creamy peanut butter, and butterscotch chips. Stir continuously until the mixture is completely melted and smooth, creating a luscious base.
  3. Add Vanilla and Cool: Stir in the vanilla extract, then remove the saucepan from heat. Allow the mixture to cool for 2 to 3 minutes. This step is important to avoid melting the marshmallows when they are added.
  4. Combine with Marshmallows: Place the fruity mini marshmallows in a large mixing bowl. Pour the slightly cooled peanut butter and butterscotch mixture over the marshmallows and gently fold together until all marshmallows are evenly coated with the peanut butter mixture.
  5. Transfer to Pan: Pour the combined mixture into the prepared pan and spread it out evenly to form a uniform layer.
  6. Chill to Set: Refrigerate the pan for 1½ to 2 hours or until the mixture is fully set and firm to the touch.
  7. Remove from Pan: Using the parchment paper overhang, lift the chilled peanut butter bars from the pan onto a large cutting board.
  8. Slice into Squares: Cut the slab into 16 equal squares using a large sharp knife. For clean cuts, run the knife under hot water and wipe it dry between slices.

Notes

  • Use a sturdy spatula or wooden spoon for folding to gently coat the marshmallows without crushing them.
  • If bars are too sticky to handle after chilling, return to fridge to firm up more before slicing.
  • Store leftover bars in an airtight container in the refrigerator for up to one week.
  • You can substitute butterscotch chips with white chocolate chips for a different flavor.
  • Ensure mixture cools before adding marshmallows to prevent melting and losing texture.
  • Prep Time: 15 minutes
  • Cook Time: 10 minutes
  • Category: Dessert
  • Method: Stovetop
  • Cuisine: American