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Peanut Butter Rice Krispie Treats Recipe

Soft and chewy peanut butter cereal treats made with marshmallows, creamy peanut butter, crispy rice cereal, and Reese’s chunks. Pressed thick and cut into large cubes for a bakery-style look and texture.
Prep Time10 minutes
Cook Time10 minutes
Set time30 minutes
Keyword: pb cereal treats, peanut butter krispie cubes, peanut butter krispie treats

Ingredients

  • 6 cups crispy rice cereal
  • 4 tbsp unsalted butter
  • 1 package 10 oz mini marshmallows (plus 1 extra cup reserved)
  • 1/2 cup creamy peanut butter
  • 1 tsp vanilla extract
  • 1/4 tsp salt
  • 1-1 1/2 cups Reese’s chunks or chopped peanut butter cups
  • Optional add-ins:
  • drizzle of melted chocolate on top
  • flaky salt finish
  • extra candy pressed on top

Instructions

Prep you pan:

  • Line a 9×9 or 9×13 pan with parchment and lightly grease it.
  • (I like parchment here because you can lift the whole slab out cleanly — especially helpful when cutting big cubes.)

On the stove:

  • In a large pot over medium-low heat, melt the butter.
  • Add the marshmallows and stir until mostly melted and smooth.
  • Add peanut butter
  • Stir in the peanut butter, vanilla, and salt until fully combined and glossy.
  • Remove from heat and quickly stir in the crispy rice cereal until coated.
  • Add extra marshmallows + candy
  • Let the mixture cool for about 2–3 minutes (so the candy doesn’t melt).
  • Fold in: reserved marshmallows or Reese's chunks

Into the pan:

  • Transfer to your prepared pan and gently press down. Don’t pack it too tight or the treats turn dense instead of soft. Lightly greased hands or a buttered spatula help a lot here.

Set and slice!

  • Let sit at room temp 30–60 minutes.
  • Lift out and cut into large square cubes.