Here's an inside look at how M&M's are made
Most of us know (and love) M&M's — those tiny, colorful chocolates that "melt in your mouth, not in your hand."
But very few of us are familiar with the process of how they're made.
Lucky for you, Business Insider recently visited the Mars Chocolate North America campus in Hackettstown, New Jersey, where 50% of all M&M's sold in the US are made.
Mars Chocolate — a segment of the $33 billion Mars candy, pet care, and beverage company — is the producer of M&M's, along with 10 other billion-dollar brands including Snickers, Dove, Milky Way, and Twix.
The Mars Chocolate North America campus, which opened in 1958 and employs 1,200 people, is home to a corporate office as well as the M&M's factory.
While touring the campus, we learned that the M&M's brand was founded by Forrest E. Mars, Sr. in 1941, and that it was the first candy in space in 1982.
Leighanne Eide, the Mars Chocolate North America site director, walked us through the factory and explained each step of the process. We were restricted from taking photos of certain top-secret areas — but below you'll get a better idea of how the M&M's-making process works:
The smell of sweet chocolate hit us as we approached the factory, which is a few hundred yards from the Mars Chocolate office in Hackettstown, New Jersey.Courtney Verrill
Upon entering the factory, we were asked to remove all jewelry. Next, Eide examined our fingernails to see if we were wearing nail polish. (They don't want chipped nail polish getting mixed in with the product.) Mine were polished, so I was asked to wear gloves. We were also required to wear a Mars-branded lab coat, like all factory associates.Courtney Verrill
Next we were given hard hats, safety glasses, ear plugs, and hair nets.Courtney Verrill
Everyone who enters the factory is required to wear this gear.Jacquelyn Smith/Business Insider
Before heading in, we were asked to wash our hands (even if we were wearing gloves for the tour).Jacquelyn Smith/Business Insider
The tour finally begins! We start by walking down this colorful hallway lined with lively paintings of M&M's characters.Courtney Verrill
The Hackettstown plant creates M&M's Milk Chocolate, M&M's Minis, and Peanut M&M's, as well as 21 different colors and custom print products.Jacquelyn Smith/Business Insider
"Mixing and tempering the chocolate are key," Eide explains. "Conching" is the first part of the process, when all of the raw material for chocolate is mixed together.Courtney Verrill
The chocolate is then sent to standardizing. where it is tempered to the correct temperature needed to create the desired shape of M&M's.Courtney Verrill
Next, the chocolates are sent through the cooling tunnels to ensure they are cooled and ready for the coloring process.Courtney Verrill
Eide let us try the M&M's chocolates at every stage in the process. "Fresh" and "sweet" don't even begin to describe how they tasted.Courtney Verrill
Once the chocolates are cooled, they are given their signature colors — a process that can't be rushed.Jacquelyn Smith/Business Insider
The coloring drips slowly until the pieces are vibrant.Courtney Verrill
The signature colors are yellow, red, green, brown, orange, and blue, the newest color. Blue was introduced in 1995 after consumers voted on a color to replace the tan M&M's, which had been around since the late 1940s.Courtney Verrill
For Peanut M&M's, the nuts — which are mainly supplied to Hackettstown from the Southeast region of the US — go through a roasting process. Then they are sprayed with chocolate three times to get the right chocolate-to-nut ratio.Courtney Verrill
"Millions of M&M's are made here each day," Eide says. The factory, which is approximately 460,000 square feet, is very loud and sweet-smelling. "The odor gets into your clothes, and it might be pleasant now, but once you get home it smells more like spoiled milk," one associate explains.Courtney Verrill
A lot of the process is proprietary and we were not allowed to see — or photograph — certain areas of the factory. "For such a small piece of chocolate, M&M's are surprisingly sophisticated," Eide explains. "We can't share all of the details behind the production process because we want to keep the magic and mystery behind the 'M' alive." For instance, she says, everyone always wants to know how they place the "M" on each M&M," but that's still top secret,"she says.Courtney Verrill
One the "M" is placed on each candy, the pieces are packaged and sent across the country.Courtney Verrill
"M&M's today taste the same as they did when the first M&M's were produced in 1941 and that's a direct result of our extreme focus on delivering consistent, outstanding quality," Eide says.Courtney Verrill
From start to finish, she says, it takes anywhere from 10 to 12 hours to create a bag of M&M's.Jacquelyn Smith/Business Insider
- Take a tour of the New York City subscription startup where you'll find swings, sneakers, and gnomes
- What Netflix CEO Reed Hastings and 24 other business visionaries were doing in their 20s
- 7 tricks to motivate yourself to clean your house even when you don't want to