Chocolate Rainbow Krispies Treats

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   ["Measure out cereal into a huge bowl and set aside.", "Melt margarine and marshmallows together in a large saucepan over low heat, stirring (do not let burn).", "As soon as the mixture has melted together, pour over the cereal and mix well using two large spoons.", "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.", "Mix well; some of the M&Ms will melt and the cereal will turn chocolaty.", "Immediately spread this mixture into a 9x13"" baking pan that has been greased or sprayed with nonstick baking spray.", "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).", "Allow to cool completely.", "When cool, cut into 12 large pieces (or smaller pieces for more servings).", "Note: regular M&Ms will not melt quickly enough, which is why I recommend the miniature."]

* Per serving · 4 servings · Values may vary.