I was recently looking for an M&Ms cookie recipe (my husband is a huge M&Ms fan), when I came across this fantastic recipe for Rainbow M&Ms Cookies from Sally’s Baking Addiction. This is the best M&Ms cookie recipe I have found (I have tried several in the past), and is sure to be one that will be made over and over again. I am pretty sure my husband and I finished off these cookies within a day or two (they were so yummy!). I hope you will enjoy these cookies as much as we did. They are the perfect treat for a rainy day or even your next family party!