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Peanut butter M&M chex bars with chocolate drizzled on top.

Peanut Butter M&M Chex Bars

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  • Author: Shelly
  • Prep Time: 10 minutes
  • Cook Time: 10 minutes
  • Total Time: 20 minutes
  • Yield: serves 16 1x
  • Category: Krispie Treat
  • Method: No Bake
  • Cuisine: Dessert


These 20 Minute Peanut Butter M&M Chex Bars are made with crunchy Chex cereal, gooey marshmallows, peanut butter M&Ms, and drizzled chocolate! Yum!


  • 6 cups Rice Chex
  • 1 (10.5 oz) bag mini marshmallows, divided
  • 3 tablespoon butter
  • 1/2 cup creamy peanut butter
  • 1 (11.4 oz) bag of peanut butter M&Ms ~ approximately 2 cups
  • 2 ounces semi sweet chocolate to drizzle


  1. Spray a 9×9 pan with cooking spray. Set aside.
  2. In a large pot over low heat, melt butter.
  3. When the butter is melted add 4 cups of your mini marshmallows. Stir until marshmallows are melted.
  4. Remove from heat.
  5. Stir in your peanut butter until incorporated.  Add your Rice Chex. Stir until evenly coated. The mixture should be cool enough now to stir in the remaining marshmallows and M&Ms without them melting.
  6. Now transfer to your 9×9 pan. Press mixture evenly in your pan.
  7. Melt the 2 oz of chocolate in the microwave on 50% power for 2 minutes (or until melted), stirring after each minute.
  8. Drizzle the chocolate on top of the Chex mix. Let cool until chocolate is set. Cut into squares and serve.


Store airtight at room temperature for up to 2 days.

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