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+ servings
A few squares of brownies stacked up on top of each other.

Chocolate Peanut Butter Marshmallow Brownies

Fudgy brownies topped off with marshmallow frosting and a crunchy chocolate peanut butter topping!
Course Dessert
Cuisine American
Keyword brownies, easy dessert recipes
Prep Time 20 minutes
Cook Time 30 minutes
Chill Time 2 hours
Total Time 50 minutes
Servings 16 brownies
Calories 681kcal


For the brownies

  • 1 batch brownies for 13x9 pan baked and cooled

For the marshmallow frosting

  • 1 cup butter
  • 7 ounces marshmallow fluff
  • 1 cup powdered sugar
  • 1 teaspoon vanilla

For the crunchy topping

  • 1 ½ cups chocolate chips
  • 1 cup peanut butter
  • 3 cups rice krispies cereal


  • Bake and cool the brownies in a 13x9 baking dish using a box mix or a homemade recipe. Set aside.
  • Add the butter, marshmallow fluff, powdered sugar, and vanilla to a medium mixing bowl and mix on low speed until well combined and fluffy.
  • Spread marshmallow frosting over the cooled brownies.
  • Add the chocolate chips and peanut butter to a small bowl and microwave in 30 second bursts until melted. Stir well.
  • Pour chocolate and peanut butter over the rice krispies cereal and stir to coat. 
  • Spread the cereal mixture over the frosted brownies.
  • Cover and place in the refrigerator for 2 hours to chill.
  • Cut into 16 slices and serve.



Serving: 1brownie | Calories: 681kcal | Carbohydrates: 68g | Protein: 5g | Fat: 45g | Saturated Fat: 11g | Cholesterol: 33mg | Sodium: 214mg | Potassium: 114mg | Fiber: 1g | Sugar: 27g | Vitamin A: 740IU | Vitamin C: 3.5mg | Calcium: 30mg | Iron: 2.1mg