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4.6 from 78 votes

Peanut Butter Rice Krispie Brownies

These Peanut Butter Rice Krispie Brownies are the perfect sweet treat! Rich brownies topped with marshmallow and peanut butter chocolate Krispie treats.

Prep Time
10 mins
Cook Time
10 mins
Additional Time
2 hrs
Total Time
2 hrs 40 mins
Servings: 16 servings
Calories: 251 kcal
Course: Dessert
Cuisine: American

Ingredients

  • 1 (18 ounce) brownie mix
  • 4 cups miniature marshmallows
  • 1-⅓ cups semi-sweet chocolate chips
  • 1 cup creamy peanut butter
  • 3 tablespoons unsalted butter
  • 2 cups crispy rice cereal

Instructions

    Cup of Yum
  1. Preheat oven to temperature directed on brownie package.
  2. Line a 9x13 pan with parchment paper.
  3. Prepare brownies according to box directions.
  4. 4 minutes before the brownies are fully cooked, pull brownies from the oven, and add marshmallows on the top.
  5. Return to oven for 4 minutes to soften marshmallows.
  6. Remove from oven and spread marshmallows over the top of brownies. Let cool completely.
  7. In a microwave-safe bowl combine chocolate chips, peanut butter, and butter.
  8. Heat on high for 30 seconds.
  9. Stir and repeat until chocolate is melted and the mixture is smooth.
  10. Add cereal and stir to combine.
  11. Drop spoonfuls of chocolate mixture over the marshmallow layer, spreading as evenly as possible.
  12. Put the brownies in the refrigerator for at least 2 hours to chill.
  13. Lift from pan and cut into squares.

Notes

  • Do not cut the brownies before the topping has set up. They will not hold together properly, resulting in a sticky mess.
  • Use whatever brownie mix is your favorite. 
  • Brownie mixes can vary in size, but you want something around 18 ounces. Anything from 17-20 ounces will work. 
  • Lining the pan with parchment paper will help you life the brownies out of the pan and make it easier to cut and not stick. 

Nutrition Information

Serving 1g Calories 251kcal (13%) Carbohydrates 24g (8%) Protein 5g (10%) Fat 16g (25%) Saturated Fat 6g (30%) Polyunsaturated Fat 2g Monounsaturated Fat 6g Trans Fat 0.1g Cholesterol 7mg (2%) Sodium 81mg (3%) Potassium 180mg (5%) Fiber 2g (8%) Sugar 14g (28%) Vitamin A 73IU (1%) Calcium 18mg (2%) Iron 1mg (6%)

Nutrition Facts

Serving: 16servings

Amount Per Serving

Calories 251

% Daily Value*

Serving 1g
Calories 251kcal 13%
Carbohydrates 24g 8%
Protein 5g 10%
Fat 16g 25%
Saturated Fat 6g 30%
Polyunsaturated Fat 2g 12%
Monounsaturated Fat 6g 30%
Trans Fat 0.1g 5%
Cholesterol 7mg 2%
Sodium 81mg 3%
Potassium 180mg 4%
Fiber 2g 8%
Sugar 14g 28%
Vitamin A 73IU 1%
Calcium 18mg 2%
Iron 1mg 6%

* Percent Daily Values are based on a 2,000 calorie diet.

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