Peanut Butter Rice Krispie Treats

Peanut butter rice krispie treats FI

Rice krispie treats with tons of peanut butter flavor! There's peanut buttery goodness in the base, the topping, and garnish!


Units Scale
  • 6 tablespoons (85 g) unsalted butter, divided (plus more to grease the pan)
  • 10 ounces (283 g) mini marshmallows
  • 2/3 cup (171 g) smooth peanut butter (any type)
  • pinch salt
  • 6 cups (170 g) rice krispies cereal
  • 10 ounces (283 g) peanut butter chips
  • 2 ounces (57 g) roasted peanuts, chopped


  1. Grease a 9 x 9 inch pan with butter. If desired, line the bottom of the pan with a strip of parchment paper, leaving some overhanging on either side of the pan (see notes 1 - 2). Grease the bottom of the parchment paper with butter (if using). Set the pan aside.
  2. Melt 4 tablespoons of the butter in a large pot set over low heat. While the butter is melting, stir it occasionally with a wooden spoon or spatula.
  3. When the butter is melted, add the mini marshmallows. As the marshmallows melt, stir them frequently, being sure to scrape the bottom of the pot occasionally to keep the marshmallows from burning.
  4. When the marshmallows are about half melted, add in the peanut butter and pinch of salt. Continue to stir frequently, scraping the bottom of the pot, until the marshmallows are completely melted and the mixture is evenly combined.
  5. Dump the rice krispies cereal into the pot. Stir gently to evenly combine the cereal with the peanut butter marshmallow mixture. When thoroughly combined, turn the stove off.
  6. Quickly scoop the rice krispie treats into the prepared pan. Use a greased spatula to pat the rice krispie treats into an even layer. Do not compress the rice krispie treats, just lightly pat them into place.
  7. Add the peanut butter chips and remaining 2 tablespoons butter to a medium microwave-safe bowl. Microwave the bowl on 50% power for 1 minute. Stir the peanut butter chips and microwave at 50% power for an additional 30 seconds, then stir again. If not yet fully melted, microwave for an additional 30 seconds at 50% power, stir again.
  8. Spread the melted peanut butter chips over the rice krispie treats in an even layer. Sprinkle the chopped peanuts on top, pressing them down gently to help them stick better.
  9. Let the peanut butter rice krispie treats cool fully, about 1 hour at room temperature or 30 minutes in the fridge.
  10. When the treats are fully cool and the topping has set, remove them from the pan in one piece using the sides of the parchment paper to lift them out. Cut the rice krispie treats into squares or bars and serve. (If you did not line the pan with parchment, you can cut them into squares while still in the pan.)


Lining the pan with parchment paper is optional, but it does allow you to lift the rice krispie treats out of the pan in one piece (just make sure to leave some extra parchment hanging out on either side to use as handles!). I found it easier to cut the rice krispie treats neatly when they are removed from the pan.

You can use a 9 x 13 inch pan instead of a 9 x 9 inch pan if you prefer. The treats will be thinner but you can also cut more servings. If using the 9 x 13 inch pan, I recommend using 15 ounces peanut butter chips and 3 tablespoons butter for the topping, so there is enough topping to cover the larger surface area. 

The rice krispie treat mixture comes together very quickly once the marshmallows are melted, so it's very helpful to have all of your ingredients prepped and measured before you start the cooking process.

This recipe was adapted from this rice krispies treats recipe.

The nutrition information below is an estimate provided by an online nutrition calculator, and should not be considered a substitute for professional medical, health, or nutritional advice. See our full nutrition disclosure policy.


Keywords: peanut butter rice krispie treats, peanut butter rice krispies