Peanut Butter-Marshmallow Rice Krispies Squares

Total Time
Prep 10 mins
Cook 0 mins

This can be made on top of the stove or in the microwave using a large heat-proof bowl --- this recipe is pretty much fool-proof so don't worry about exact measurements, the frosting drizzle is only optional, I most always double the recipe and spread into a 13 x 9-inch pan, throw in some salted chopped peanuts also! :)

Ingredients Nutrition

  • 13 cup butter (a little more butter is okay)
  • 5 cups mini marshmallows
  • 1 teaspoon vanilla
  • 23 cup peanut butter (more won't hurt!)
  • 5 cups Rice Krispies
  • 3 -4 tablespoons canned frosting (vanilla or chocolate) (optional)


  1. In a large saucepan melt the butter over medium heat.
  2. Add in marshmallows and vanilla; stir until melted.
  3. Mix in the peanut butter until combined.
  4. Remove from heat and mix in the rice cereal.
  5. Pat firmly into a 9 x 9-inch or an 11 x 7-inch pan.
  6. Place the frosting in microwave-safe bowl and microwave until melted (about 15 seconds) drizzle on top of the mixture.


Most Helpful

Really good! Just like I used to make with my Mom and Grandma. I added 1 cup of raisins. It took a 10oz bag of mini marshmallows. Melt them slowly over low heat and stir constantly to avoid scorching.

CynthiaA123 December 01, 2016

This was really good, next time I am going to try and add some peanuts and sprinkle mini chocolate chips on top for a sinfully delicious snack.

broke student November 14, 2010

Excellent! I live in an expat community in Beijing, China and usually bring Rice Krispy treats as a dessert for kids and adults alike to all picnics, school functions, etc. I tried your peanut butter version and WOW! Delicious! I used chunky peanut butter and it was divine- everyone LOVED them! Thanks!

meganellenkieran May 25, 2009

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