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Marshmallow and peanut butter cereal bars in a white baking dish
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5 from 1 vote

No Bake Reeses Peanut Butter Cereal Bars

These amazing Reeses Peanut Butter Cereal Bars are what dreams are made of! Ooey gooey peanut butter goodness in a fluffy marshmallow cereal bite, complete with Reeses Peanut Butter Cup chunks and a white chocolate drizzle! Oh my!
Prep Time15 mins
Cook Time5 mins
Cooling time15 mins
Total Time20 mins
Course: Dessert
Cuisine: American
Servings: 15 people
Calories: 398kcal
Author: The Carefree Kitchen


  • 1/2 Cup Butter
  • 1/2 Cup Karo Syrup
  • 1/2 Cup Sugar
  • 1/2 Cup Peanut Butter
  • 12 oz Mini Marshmallows
  • 12 Cups Reese's Puff Cereal
  • 6 oz White Chocolate melted
  • 12 oz Reese's Cups chopped


  • Spray a 9"x 13" pan with non-stick cooking spray and set aside. 
  • Put your white chocolate into a microwave safe container and microwave for about 20-30 seconds. Stir, then microwave again for another 20-30 seconds. Continue to microwave for 20-30 seconds at a time, stirring in between, until your chocolate is fully melted. Set aside.
  • In a large and deep non-stick pot, melt the butter. 
  • Add the Karo syrup, and sugar and stir until the mixture comes to a boil.  Boil for 1 minute, then reduce the heat to low and mix in the peanut butter and marshmallows.  Keep stirring until the mixture comes to a boil again.
  • Take off the heat and add the cereal.  Stir until well mixed.
  • Pour into your prepared baking dish and spread evenly with a spatula.
  • Sprinkle the chopped Reeses Peanut Butter Cups on the cereal bars and then drizzle the melted white chocolate over the bars.
  • Let sit for 10 minutes or so until the cereal bars are cool and the chocolate has set on the top.  You can speed up this process by putting them in the fridge too. 
  • Once you are ready to serve, cut into 3" squares and enjoy!




To make these gluten-free, just substitute your favorite gluten-free cereal and be sure to check the label of the marshmallows that you use.  Everything else is already gluten-free!


Calories: 398kcal | Carbohydrates: 68g | Protein: 6g | Fat: 14g | Saturated Fat: 7g | Cholesterol: 18mg | Sodium: 321mg | Potassium: 269mg | Fiber: 6g | Sugar: 41g | Vitamin A: 995IU | Vitamin C: 0.1mg | Calcium: 48mg | Iron: 8.9mg