Chocolate Rainbow Krispies Treats

Total Time
Prep 5 mins
Cook 15 mins

This is a colorful twist on the old favorite "Rice Krispy" treats. These go over well with children and are a big seller at bake sales. You may cut them into much smaller squares, if desired. We like them huge!

Ingredients Nutrition

  • 80 large marshmallows (or 10 cups mini size)
  • 12-34 cup margarine (or unsalted butter)
  • 12 cups Rice Krispies
  • 34-1 cup miniature M&M's chocolate candies (not regular size!)
  • nonstick cooking spray


  1. Measure out cereal into a huge bowl and set aside.
  2. Melt margarine and marshmallows together in a large saucepan over low heat, stirring (do not let burn).
  3. As soon as the mixture has melted together, pour over the cereal and mix well using two large spoons.
  4. Let the cereal mixture cool down just a few seconds, then stir in 1/2 cup of the mini M&Ms candies, saving the remaining 1/2 cup for later.
  5. Mix well; some of the M&Ms will melt and the cereal will turn chocolaty.
  6. Immediately spread this mixture into a 9x13" baking pan that has been greased or sprayed with nonstick baking spray.
  7. Sprinkle the remaining 1/2 cup M&Ms over the top, pressing if needed to make them stick to the top (using a large sheet of wax paper to press will keep your fingers from getting sticky).
  8. Allow to cool completely.
  9. When cool, cut into 12 large pieces (or smaller pieces for more servings).
  10. Note: regular M&Ms will not melt quickly enough, which is why I recommend the miniature.
Most Helpful

What a way to make rice krispie treats! These were fantastic! Thanks.

~*Miss Diggy*~ October 22, 2002

Heather, I made these for a bake sale at my daughter's school, and they were so yummy! I did use the mini M&M's, but they didn't melt, strangely enough. But NO MATTER! They were still very colorful and they tasted great. I did cut them very large, ended up with 15 in one pan, and 20 in another. Kids should get their 25 cents worth, right? :) You said 1/2 to 1 cup of margarine, I used 3/4 cup of butter, and mini mallows. Melted them in the microwave, which is probably why the M&M's didn't melt. But they took 2 minutes, a stir, 1 minute, a stir, and then 15-30 seconds, till they were ready. Thanks for a great twist on an old favorite!

ciao February 13, 2003

What a fabulous recipe! We all loved it, cleaned the pan in no time. Pretty to look at also. The only change I made was to use a non-stick pan and butter instead of margerine. A little tip that worked extremely well for me was to wet my hands and then press down the mixture. I'm submitting a photo in gratitude. Thanks again HeatherFeather for such a tasty treat!

HOUSEMANAGER (Charlene) February 02, 2003