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Rainbow Rice Krispies Treats

The pot of gold at the end of this rainbow is the easy recipe for these fruity Rainbow Rice Krispies Treats! 

 

rainbow rice krispie treats stacked on a plate

Do you even see what your eyes are beholding? How cute are these Rainbow Rice Krispies Treats?! They’re perfect for St. Patrick’s Day but really are a fun treat all year long. 

Rice Krispies Treats are one of those food items that are much better homemade than store-bought. Whether you’re making the recipe on the back of the box or buying the individually wrapped treats, they don’t hold a candle to what you can do in your own kitchen.

For example, you can adapt with ad-ins and different cereals that you can’t buy on grocery store shelves! This version mixes Fruity Pebbles to give a fruity flavor and Lucky Charms marshmallows for even more sweetness and a festive St. Patty’s Day spin! These would be perfect for a classroom or an exciting way to get in the kitchen with the kiddos to test their mixing and measuring skills!

 

 

rainbow rice krispie treats stacked on a plate

rainbow rice krispie treats stacked on a plate

Rainbow Rice Krispies Treats Ingredients and Subs

unsalted butter — You could use salted butter, just omit the salt in the recipe. 
mini marshmallows — A fresh bag is best. Don’t use the leftover marshmallows you have from last year’s hot chocolate. 
fine sea salt — half the amount if you need to use table salt. 
vanilla extract
Rice Krispies cereal 
Fruity Pebbles cereal — Obviously, you can use off-brand of all of these cereals if you like. 
Lucky Charms marshmallows (yes, pick the marshmallows out of a box of cereal) — This is optional but so fun. Have the kids work on picking out the marshmallows while you prep the other ingredients. 

rainbow rice krispie treats stacked on a plate

 

 How to make

Line a 9×9-inch pan with parchment paper or foil with an overhang to easily remove the treats. Spray with cooking spray. Set aside.
In a large nonstick pot, melt the butter over low heat. Once the butter is completely melted, add in all but 2 and 1/2 cups of the marshmallows. Stir the marshmallows and butter constantly until the marshmallows are completely melted.
When the marshmallows are just melted, remove the pan from the heat. Stir in the salt and vanilla extract. Then, stir in the Rice Krispies and Fruity Pebbles cereals, folding in gently. Stir in the reserved 2 and 1/2 cups marshmallows. Stir until combined.
Transfer the mixture into the lined pan. Top with 1/2 cup lucky charms marshmallows (optional). Lightly spray your hands with cooking spray and gently press the bars evenly into the pan. Do not pack too tightly.
Allow the bars to cool and set up before using the overhang to pull the bars out and cut them into squares.

How to get perfect Rice Krispies Treats

While Rice Krispies Treats are one of the easiest desserts to make, they can all end up so differently. What’s with the variation? Here’s what I like to do to get perfect Rice Krispies Treats, Fruity, or otherwise. 

Use a 9×9 pan, NOT a 13X9. I’m not sure who would argue this, but thick Rice Krispies Treats > thin Rice Krispies Treats. At the same time, it’s important to gently press your mixture into the pan, just enough so that it’s uniform. Rice Krispies Treats that are too compact are more likely to be too hard and dense and not light and chewy. 

Fold in extra marshmallows off the heat. If you read the back of the Rice Krispies box, they have you melt all of the marshmallows and press into a 13×9 dish. Two no no’s in my book. A perfect Rice Krispies Treat has pockets of whole marshmallows throughout making them extra gooey and soft. We do this by reserving 2 1/2 cups of mini marshmallows from the bag and folding them in off the heat with the cereal. *Chef’s kiss*

Pair these two tips with super low heat and fresh marshmallows (not a stale open bag) and you’re bound for Rice Krispies Treats greatness.

rainbow rice krispie treats stacked on a plate with marshmallow scattered around table rainbow rice krispie treats stacked on a plate with a glass of milk in the background

Can I make Rice Krispies Treats in the microwave?

Technically, sure. But, I’m a big believer that heating up your marshmallows over low heat is best to avoid hard Rice Krispies Treats. If you do decide to melt your marshmallows in the microwave, be sure to do it in small bursts so that you don’t overheat the marshmallows. I would do this for 30-seconds at a time for up to 1 minute 30 seconds. You would want them to be just melted and then stir until fully melted. 

Why do my Rice Krispies Treats get hard?

Possibly a few things.

  • The marshmallows were melted at too high a temperature.
  • The Rice Krispies Treats were pressed too firmly into the pan.
  • You melted all of the marshmallows as opposed to folding some in at the end.
  • They’re getting old! Rice Krispies Treats are really best eaten the same day. You can store them in an airtight container for up to 3 days, but their texture is going to depreciate quickly. 
  • rainbow rice krispie treats stacked on a plate with marshmallows with a glass of milk in the background

More Rice Krispies Treats and Cereal Bar Recipes!

Browned Butter Pumpkin Spice Rice Krispies Treats

Fruit and Nut Cereal Bars

Tahini Browned Butter Rice Krispies Treats for Two

Toasted Marshmallow Smores Rice Krispies Treats (MY FAVE)

I hope you enjoy this recipe! Take a browse around the site and please let me know if you make anything by leaving a comment and rating the recipe below. Don’t hesitate to reach out if you have any questions, concerns, or requests! 

Rainbow Rice Krispies Treats

Rainbow Rice Krispies Treats

Yield: 12 Treats
Prep Time: 10 minutes
Cook Time: 5 minutes
Additional Time: 10 minutes
Total Time: 25 minutes
The pot of gold at the end of this rainbow is the easy recipe for these fruity Rainbow Rice Krispies Treats! 

Ingredients

  • 5 tablespoons unsalted butter
  • 1 10-ounce bag mini marshmallows, divided
  • 1/4 teaspoon fine sea salt
  • 1 teaspoon vanilla extract
  • 2 cups Rice Krispies cereal
  • 4 cups Fruity Pebbles cereal
  • 1/2 cup Lucky Charms marshmallows (yes, pick the marshmallows out of a box of the cereal), optional

Instructions

  1. Line a 9×9-inch pan with parchment paper or foil with an overhang to easily remove the treats. Spray with cooking spray. Set aside.
  2. In a large nonstick pot, melt the butter over low heat. Once the butter is completely melted, add in all but 2 and 1/2 cups of the marshmallows. Stir the marshmallows and butter constantly until the marshmallows are completely melted.
  3. When the marshmallows are just melted, remove the pan from the heat. Stir in the salt and vanilla extract. Then, stir in the Rice Krispies and Fruity Pebbles cereals, folding in gently. Stir in the reserved 2 and 1/2 cups marshmallows. Stir until combined.
  4. Transfer the mixture into the lined pan. Top with 1/2 cup lucky charms marshmallows (optional). Lightly spray your hands with cooking spray and gently press the bars evenly into the pan. Do not pack too tightly.
  5. Allow the bars to cool and set up before using the overhang to pull the bars out and cut them into squares.

Notes

See the blog post above.

Did you make this recipe?

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