Forrest Mars invented the recipe for M&Ms chocolate during the Spanish Civil War. Mars saw soldiers eating pieces of chocolate covered with a hard sugary coating. The coating preventing the candy from melting in the hot sun. Forrest Mars received a patent for his manufacturing process on March 3, 1941.
M&Ms chocolate were first sold to the public in 1941, packaged in cardboard tubes. In 1948, the packaging changed from a tube to the brown plastic pouch known today. The letter “m” is printed on each candy with vegetable dye.
In 1954, “M&Ms Peanut Chocolate Candies were introduced. That same year, the M&Ms brand characters and the famous slogan “The milk chocolate melts in your mouth, not in your hand” were both trademarked.