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

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: Jill Baird


  • 1/2 Cup Butter
  • 1/2 Cup Karo Syrup
  • 1/2 Cup Peanut Butter
  • 1/2 Cup Sugar
  • 12 oz Mini Marshmallows
  • 12 Cups Reeses Puff Cereal
  • 1 12oz Reeses Cups (Chopped)
  • 6 oz White Chocolate Wafer


  • Spray a 9 by 13" pan with non-stick cooking spray. Set Aside.  Be sure to have all the ingredients measured and ready to go.  This recipe goes quickly as soon as you start cooking.
  • In a large and deep, (preferably non-stick) pot, melt the butter. 
  • Add the karo syrup, and sugar.  Stir while the mixture comes to a boil.  Boil for 1 minute. Turn the heat to low and mix in the peanut butter and marshmallows.  Keep stirring the mixture until it comes to a boil again.
  • Take off the heat and add the cereal.  Stir until mixed.
  • Pour into the greased 9 by 13" baking dish.
  • Melt the white chocolate wafers in the microwave--Pour the white chocolate into a microwave safe bowl and microwave for 30 seconds.  Take the chocolate out and stir, microwave for another 30 seconds, stir.  Keep repeating this process until all the chocolate is melted and smooth.  It should be about 2-3 minutes. 
  • Sprinkle the chopped Reeses Peanut Butter Cups on the cereal bars and then drizzle white chocolate over the bars.
  • Let sit for 10 minutes or so until the cereal bars are cool.  You can speed up this process by putting them in the fridge too.  Cut into 3" squares and enjoy!!



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