Rainbow Rice Krispie Treats recipe is a colorful and fruity twist on the traditional marshmallow and cereal snack.

Perfectly gooey, crispy and crunchy, with plenty of Fruity Pebbles fun flavor throughout, these treats are an easy, no bake dessert that will brighten up any birthday, St. Patrick’s Day celebration, or rainbow themed party.

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Rainbow Rice Krispies Treats

Our colorful Rainbow Rice Krispie Treats with Fruity Pebbles and Marshmallows take only 5 minutes to prepare using only melted marshmallows, butter, salt, and cereal.

These rice crispy treats take a classic rice Krispie recipe and turn it into a colorful rice Krispies square that’s full of fun, fruity flavor (and a little red, orange, yellow, green, blue) with a satisfying crunch.

Colorful Rice Krispie treats are so easy to make: simply melt, stir, and press into a pan (no gel food coloring required)!

With just the right ratio of cereal to marshmallows, each square is sweet, thick, not too sticky, and filled with a rainbow of flavors and pops of color – it’s always fun to elevate a basic bar into the best tasting fruity treat for any day snacking! 

Why We Love Rainbow Rice Crispy Treats

  • Quick and easy to make in mere minutes.
  • Uses only 5 ingredients.
  • Rainbow desserts are a delicious way to add a pop of color to any party.
  • Light and chewy texture with a fun, fruity taste in every square.
  • Perfect for birthday parties, movie nights, Rainbow parties, Pride celebrations, St. Patrick’s Day or just to make your day more colorful.
Rainbow Rice Krispie Treats ingredients

Rainbow Rice Krispie Treats Ingredients

  • Salted butter: You can substitute unsalted butter with a pinch or two of salt. 
  • Marshmallows For this recipe, you want a 12-ounce bag of marshmallows. The Jet Puff brand has a 12-ounce bag. If you can’t find or don’t want to get a 12-ounce bag, you will need 48 regular-sized marshmallows.
  • Salt
  • Rice Krispies cereal: You can use a name brand or a generic brand of Rice Krispies cereal for this recipe. 
  • Fruity Pebbles with Marshmallows cereal

Substitutions and Additions

  • Pick Your Pebbles: You can substitute just fruity pebbles, if necessary, for a slightly less sweet result. Or you can substitute 2 cups of regular fruity pebbles and ½ cup of mini marshmallows or cereal marshmallows from another box. 
  • Customize Your Krispies: You can decorate your Rice Krispies squares for any holiday or special occasion. Press candy hearts on the surface of each square before the mixture sets for Valentine’s Day; add Lucky Charms cereal marshmallows into the mixture for St. Patrick’s Day; place some Cadbury mini-eggs on top of the Krispies before they set for Easter.
rainbow rice krispie treats
  • 9×9 inch baking pan
  • Parchment paper
  • Cooking spray
  • Large saucepan
  • Spreading tools

How to Make Rainbow Rice Krispie Treats

  1. Melt The Marshmallows: Melt the butter and then stir in the marshmallows and salt. Continue heating, stirring continuously, until the marshmallows are completely melted and smooth.
  2. Make The Cereal Mixture: Remove the pan from the heat and fold in the Rice Krispies and Fruity Pebbles with Marshmallows until fully combined.
  3. Pour Into The Pan: Scoop the mixture into the prepared baking pan and smooth it into an even layer. Cool completely before cutting into squares and serving.
  4. Slice and Serve: Cut, serve, and enjoy!

Tips For Making Rainbow Rice Krispie Treats

  • Make sure to use the correct amount of butter as specified in the recipe so that the texture and flavor turn out correctly. Otherwise the treats will be dry and crumbly.
  • Don’t overheat your marshmallows or you will end up with hard, difficult-to-bite treats.
  • Using stale cereal can result in treats with an unpleasant texture. I always recommend using fresh, new cereal for this recipe. Afterward, you can enjoy a nice bowl of cereal as well!

How to Store Rice Krispie Treats

  • To Store: Rice Krispie Treats can be stored at room temperature for up to 3-4 days or in the refrigerator for up to a week.
  • To Freeze: To freeze, wrap the Rice Krispie Treats tightly in plastic wrap and place them in an airtight container or freezer bag. They will keep in the freezer for up to 3 months.
bitten Rainbow Rice Krispie Treats

The Best Way To Store Rainbow Rice Krispie Treats

Rainbow Rice Krispie Treats should be stored in an airtight container or wrapped tightly in plastic wrap to keep them fresh. They can be stored at room temperature for up to 3-4 days or in the refrigerator for up to a week.

If you plan to store them for longer than a week, it is best to freeze them. Simply wrap them tightly in plastic wrap and place them in an airtight container or freezer bag. They will keep in the freezer for up to 3 months.

When you’re ready to eat them, be sure to thaw them at room temperature for a few hours before serving. They dry out easily, which causes them to get hard and unpleasant to eat, so be sure they are well-wrapped, no matter how you store them.

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Frequently Asked Questions

What if I overheat the marshmallows?

If the marshmallows are overheated, you will often end up with hard, difficult-to-bite treats. If you heat the marshmallows for too long or at too high of a temperature, they may also burn and give the treats a burnt taste. Heat the marshmallows over medium-low heat and stir continuously until they are melted and smooth. It is important to be patient with this step and stay next to the pan the whole time! 

Why do I have to stir the mixture so frequently?

Not stirring the mixture enough can lead to uneven distribution of the cereal and marshmallows. You want to mix gently so that the cereal doesn’t get crushed, but if it isn’t mixed enough, you will get dry areas and areas of just marshmallows. So be sure to stir it well but be slow and gentle.

What if I don’t press the mixture firmly into the pan?

If you don’t press the mixture down firmly enough, the treats will be loose and crumbly. If you are having difficulty getting an even layer in the pan, you can grease your spreading spatula or even grease your hands and press the treats into a nice, thick, even layer. If the treats start sticking to the tool or hands, feel free to re-grease as necessary. 

square pieces rice krispie treats

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5 from 2 votes
rainbow rice krispie treats featured image

Rainbow Rice Krispie Treats

Serves — 18
Rainbow Rice Krispie Treats are the best bite of Rice Krispies, Fruity Pebbles, and marshmallows all mixed into a delicious no bake bar. Perfectly gooey marshmallows, crispy cereal, and a pop of color make this recipe a hit for any holiday or special occasion.
Prep Time 5 minutes
Cook Time 5 minutes
Total Time 10 minutes

Ingredients
  

  • ¼ cup (½ stick) salted butter
  • 12 ounce bag of marshmallows
  • ½ teaspoon salt
  • cups rice krispies cereal
  • cups fruity pebbles with marshmallows cereal

Instructions
 

  • Line a 9×9 inch baking pan with parchment paper and spray it lightly with cooking spray.
  • Melt the salted butter in a large saucepan for about 2 minutes over medium-low heat.
  • Once the butter has melted, stir in the marshmallows and salt.
  • Continue heating over medium-low or low heat, stirring continuously, until the marshmallows are completely melted and smooth, about 2-3 minutes.
  • Remove the pan from the heat and gently fold in the rice krispies and fruity pebbles with marshmallows until all the cereal is evenly mixed into the marshmallow mixture.
  • Scoop the resulting mixture into the prepared baking pan and smooth it into an even layer with a spreader or your clean hands.
  • Cool completely before cutting into squares and serving.

Jenn’s Notes

Storage:
  • To Store: Rainbow Rice Krispie Treats can be stored at room temperature for up to 3-4 days or in the refrigerator for up to a week.
  • To Freeze: To freeze, wrap the Rainbow Rice Krispie Treats tightly in plastic wrap and place them in an airtight container or freezer bag. They will keep in the freezer for up to 3 months.
Tips:
  • Make sure to use the correct amount of butter as specified in the recipe so that the texture and flavor turn out correctly. Otherwise the treats will be dry and crumbly.
  • Don’t overheat your marshmallows or you will end up with hard, difficult-to-bite treats.
  • Using stale cereal can result in treats with an unpleasant texture. I always recommend using fresh, new cereal for this recipe. Afterward, you can enjoy a nice bowl of cereal as well!

Nutrition Info

Calories: 124kcal | Carbohydrates: 25g | Protein: 1g | Fat: 3g | Saturated Fat: 2g | Polyunsaturated Fat: 0.2g | Monounsaturated Fat: 1g | Trans Fat: 0.1g | Cholesterol: 7mg | Sodium: 157mg | Potassium: 15mg | Fiber: 0.1g | Sugar: 12g | Vitamin A: 803IU | Vitamin C: 7mg | Calcium: 2mg | Iron: 3mg

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Comments

  1. These look so yummy! I would have never really thought to put sprinkles in them but that’s a great idea! I’ve also made these with fruity pebbles and cocoa pebbles which is so amazing! Thanks for sharing, definitely making these this week 🙂