M&M’s are among the most recognizable candies in the world, famous for their colorful shells and chocolate centers. People enjoy them at movie theaters, share them at parties, and add them to cookies and desserts. Despite their simple appearance, the two letters printed on each candy have an interesting history dating back to the early 1940s.

The initials M&M stand for Mars and Murrie, the surnames of the two men behind the original candy. Forrest Mars Sr., the son of the founder of the Mars candy company, partnered with Bruce Murrie, whose father, William Murrie, was a senior executive at Hershey. Their partnership combined Mars’s business vision with access to Hershey’s chocolate supplies.

M&M’s were first introduced in 1941, during a period when convenient, portable food was especially valuable. The inspiration reportedly came from chocolate covered in a hard sugar shell, which soldiers had eaten during the Spanish Civil War. This coating helped prevent the chocolate from melting quickly when handled.

During World War II, M&M’s became popular among American military personnel because they were easy to carry and could withstand warmer conditions better than uncoated chocolate. Their practical design helped establish the candy’s reputation as a convenient snack for people on the move.

The original M&M’s looked different from the varieties sold today. Early candies featured brown shells with a small letter printed on each piece. As the brand grew, new colors appeared, making the candies more appealing to children and adults alike.

Over the years, the company introduced peanut M&M’s, peanut butter varieties, and numerous other flavors. Seasonal colors, special packaging, and creative advertising helped transform the candy into a worldwide favorite. However, the basic combination of chocolate and a protective candy shell remained unchanged.

Although Bruce Murrie helped establish the original partnership, it eventually ended, and Forrest Mars gained control of the business. M&M’s continued to expand under the Mars company, becoming one of its best-known products.

Today, M&M’s are sold in countries around the world. Their familiar letters represent more than a brand name: they commemorate the collaboration between two businessmen whose partnership helped create a lasting candy sensation.