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Rainbow Rice Krispies Treats

by Jessie Daye

First published: January 7, 2018 | Updated: June 10, 2026

You can’t have a rainbow without a little rain. And you can’t have a Rainbow Rice Krispies Treat without a little hard work! Nothing worth having comes easy : ) 

These Rice Krispies rainbows are adorable and would be very cute for a rainbow themed birthday party. They take a bit of time as you have to mix all the colors and separate everything out, but the end result is pretty sweet.

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Rainbow Rice Krispies Treats

Ingredients
6 cups Rice Krispies
36 large marshmallows
3 tablespoons of butter
Small marshmallows for clouds

Directions
1. When making these Rainbow Rice Krispies treats you must be super organized. Spray an 8″ x 8″ square pan with nonstick spray and line the bottom with parchment paper. Set aside.

2. Next, line up your 6 food coloring gels with a toothpick in each one and set aside.

3. Set up 6 paper bowls and put 6 marshmallows and 1/2 tbs of butter into each bowl. Set aside.

4. Place the first paper bowl in the microwave and heat on high for 20 seconds. No more than that. Remove from the microwave and add a tiny amount of red food coloring gel. Stir just until color is mixed in. Do not over mix or you will have a hard Rice Krispies treat. Take this from someone who made them. Now add, one cup of Rice Krispies to this mix and stir together and press on the bottom of your pan.

5. Place the second paper bowl in the microwave and heat on high for 20 seconds. Remove from the microwave and add a tiny amount of orange food coloring gel. Stir just until color is mixed in. Do not over mix. Add, one cup of Rice Krispies to this mix and stir together and press on the top of the red Rice Krispies treat.

6. Continue this process until you have all the colors stacked on top of each other. Allow to cool on the counter for 25 minutes before cutting into bars.

7. Flip the giant Rice Krispies square onto the counter. Slice the Rice Krispies treat into rectangles so all of the colors are in each piece (Red being on the top). Carefully bend into a rainbow and place marshmallows on the bottom of each pieces so they look like clouds.

Rainbow Rice Krispies Treats

Author: Jessie Daye
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Total 25 minutes
Colorful stacked Rice Krispies treats shaped into rainbows with marshmallow clouds, perfect for rainbow-themed parties.

Ingredients

  • 6 cups Rice Krispies
  • 36 large marshmallows
  • 3 tablespoons butter
  • small marshmallows for clouds
  • 6 food coloring gels red, orange, yellow, green, blue, purple

Method

  1. Spray an 8" x 8" square pan with nonstick spray and line the bottom with parchment paper. Set aside.
  2. Line up your 6 food coloring gels with a toothpick in each one and set aside.
  3. Set up 6 paper bowls and put 6 marshmallows and 1/2 tablespoon of butter into each bowl. Set aside.
  4. Place the first paper bowl in the microwave and heat on high for 20 seconds. Remove from the microwave and add a tiny amount of red food coloring gel. Stir just until color is mixed in without over mixing. Add one cup of Rice Krispies to this mix and stir together and press on the bottom of your pan.
  5. Place the second paper bowl in the microwave and heat on high for 20 seconds. Remove from the microwave and add a tiny amount of orange food coloring gel. Stir just until color is mixed in. Add one cup of Rice Krispies to this mix and stir together and press on the top of the red Rice Krispies treat.
  6. Continue this process with the remaining colors until you have all the colors stacked on top of each other.
  7. Allow to cool on the counter for 25 minutes before cutting into bars.
  8. Flip the giant Rice Krispies square onto the counter. Slice the Rice Krispies treat into rectangles so all of the colors are in each piece with red being on the top. Carefully bend into a rainbow and place marshmallows on the bottom of each piece so they look like clouds.

Notes

Be well organized before starting. Do not over mix the marshmallow mixture or the treats will be hard. Heat each bowl for no more than 20 seconds to avoid overheating.

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Hi, I'm Jessie. 

I’m a Los Angeles mama, home renovator, and lifelong creative, sharing the things that make everyday life a little more beautiful. I believe food is one of the best ways to bring people together, which is why I love cooking: it turns an ordinary Tuesday into something worth remembering. From recipes I make on repeat to DIY projects, home design, and a little bit of real life in between — welcome to my corner of the internet. I’m so glad you’re here.

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