M and M candy is made by Mars Incorporated, one of the largest private food and confectionery companies in the world. The company first introduced the iconic shell coated chocolate candies in 1941 to give soldiers a mess free sweet treat. Today Mars produces a wide variety of flavors, including peanut, crispy, pretzel, and caramel versions enjoyed globally. The candy remains famous for its colorful candy shell and signature letter stamped on every piece.