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Rainbow Rice Krispie Marshmallow Treats
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5 from 1 vote

Rainbow Rice Krispie Marshmallow Treats

Can we all agree, there's nothing better than "somewhere-over-the-rainbow" gooey marshmallowy cereal treats to make everyone smile and jump for joy!  Made with Rice Krispies, Fruity Pebbles, lots of marshmallows and a few little extras, these are amazing as well as addictive.  There's no place like home, like in home-made, right? 
Prep Time15 mins
Course: Dessert
Cuisine: American
Keyword: Fruity Pebbles, marshmallow, party treats, Rice Krispies, treats
Servings: 12 Servings
Author: Kim Lange


  • 5 tablespoons butter
  • 10 cups mini marshmallows divided, into 8 cups & 2 cups
  • 4 cups Rice Krispie Cereal
  • 2 cups Fruity Pebbles
  • ½ teaspoon kosher salt optional
  • 1 teaspoon vanilla extract optional


  • Line 9x9 pan with parchment paper and spray with cooking spray. Set aside. (Use 8x8 pan for extra thick treats - 9x13 pan - double recipe)
  • Melt butter in a large Dutch oven or pot. Add 8 cups (16 oz) of marshmallows and stir until completely melted on low heat.
  • Remove from heat and add salt and vanilla (optional).
  • Add the Rice Krispies, Fruity Pebbles, and 2 more cups (2 & ½ oz) of marshmallows to melted marshmallow mixture to get the gooey marshmallow starting to melt and continue stirring to coat completely.
  • Pour mixture into prepared pan and press in evenly.
  • Add some extra marshmallows on top if you wish or you can also top with some melted white chocolate drizzles for some added fun!
  • Let set in pan for up to one hour before cutting into bars.
  • Store airtight at room temperature for up to 3 days, but Krispie treats are always best the first day.


9 - 16 servings depending on how you slice them .
Use other cereals if you wish.
For the 2 cups you add in at the end, use 2 cups of spring colored (pink, green, yellow) mini marshmallows instead of white for even more color!