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Stack of chocolate marshmallow bar with colorful fruity marshmallows.

4 Ingredient Peanut Marshmallow Bars

I like fruit flavored marshmallows for this recipe. Feel free to use plain vanilla marshmallows if you prefer.
Prep Time 15 minutes
Cook Time 3 hours
Total Time 3 hours 15 minutes
Servings 24 bars
Author GlutenFreeBaking.com


  • 2 cups semi-sweet chocolate chips
  • 1 cup smooth peanut butter
  • 1 stick unsalted butter
  • 1 (10 ounce) bag fruit-flavored or vanilla marshmallows


  1. Line a 9x9x2-inch pan with parchment paper.
  2. In a small heavy-bottomed saucepan, combine chocolate chips, peanut butter, and butter. Turn on heat to low. This is important. You need to treat this sauce gently or it might scorch. Stir with a wooden spoon or heat resistant spatula until ingredients are melted and smooth. Sauce should be shiny.
  3. Remove pan from heat. Allow to cool for two minutes. 

  4. Stir marshmallows into cooled chocolate mixture. Spread mixture into prepared pan. 

  5. Chill for three hours or overnight. Using parchment paper, lift bars out of pan. Cut into small squares (These are sweet and rich. Small bars are perfect.)

  6. Serve or store in a sealed container.