<P> M&M's originated in the United States in 1940, and are sold in over 100 countries, since 2003 . More than 400 million individual M&M's are produced every day in the United States . They are produced in different colors, some of which have changed over the years . The candy - coated chocolate concept was inspired by a method used to allow soldiers to carry chocolate without having it melt . The company's longest - lasting slogan reflects this: "Melts in your mouth, not in your hand ." </P> <P> A traditional milk chocolate M&M weighs about 0.91 grams / 0.032 ounces and has about 4.7 kilocalories (kcal) of food energy (1.7 kcal from fat). </P> <P> Forrest Mars, Sr., son of the Mars Company founder, Frank C. Mars, copied the idea for the candy in the 1930s during the Spanish Civil War when he saw soldiers eating British made Smarties, chocolate pellets with a colored shell of what confectioners call hard panning (essentially hardened sugar syrup) surrounding the outside, preventing the candies from melting . Mars received a patent for his own process on March 3, 1941 . Production began in 1941 in a factory located at 285 Badger Avenue in Clinton Hill, Newark, New Jersey . When the company was founded it was M&M Limited . The two "Ms" represent the names of Forrest E. Mars Sr., the founder of Newark Company, and Bruce Murrie, son of Hershey Chocolate's president William F.R. Murrie, who had a 20 percent share in the product . The arrangement allowed the candies to be made with Hershey chocolate, as Hershey had control of the rationed chocolate at the time . </P> <P> The demand for the candies during World War II caused an increase in production and its factory moved to bigger quarters at 200 North 12th Street in Newark, New Jersey, where it remained until 1958 when it moved to a bigger factory at Hackettstown . During the war, the candies were exclusively sold to the military . </P>

What does the m&m stand for on the candy