All of Ben & Jerry’s decisions are guided by its three-part mission statement: to make the best products, to be financially successful and to stand up for social causes. From start to finish, these principles also drive the operations and the floor workers at the company’s ice cream factory in St. Albans, Vt.

“The employees know what we’re doing benefits the public and the community,” said Randy Aiken, manufacturing manager at the St. Albans facility.

The plant is also one of the biggest employers in the area, which is just north of the company’s headquarters in South Burlington. It was built in 1994, employs over 200 people and runs 24 hours a day, seven days a week to produce more than 528,000 pints of ice cream a day.

The St. Albans plant is one of three Ben & Jerry’s processing facilities; the others are located in Waterbury, Vt., and Hellendoorn, the Netherlands. Milk used in the St. Albans plant is sourced from the St. Albans Cooperative Creamery, which is located just 1.5 miles from the plant.

St. Albans Cooperative Creamery also is part of Ben & Jerry’s Caring Dairy program. Ben & Jerry’s created the sustainable agriculture program to provide farmers with a structure to evaluate, implement and continuously improve their practices. It includes the use of cover and rotational crops and alternative tilling techniques. The program also addresses animal care and good labor practices for farmworkers.

“The Caring Dairy program is important to the teammates,” said Factory Director Rob Bellezza. “It’s important for the social mission that Ben & Jerry’s stands for.”

Read more about Ben & Jerry’s in the related article here.


It starts with the mix

Tanker trucks arrive at the facility carrying condensed skim milk and cream that have been separated at the cooperative. The milk and cream are tested for butterfat and solids and undergo a microbiological screening. They are then offloaded into six 12,000 gallon tanks, three of which are dedicated to cream and three of which are dedicated to condensed skim milk. The ingredients can stay in these tanks for up to 72 hours until the plant is ready to use them, but usually are turned over much more quickly.

When a batch is ready to be made, the cream and milk are incorporated with other wet ingredients such as liquid sucrose and cage-free eggs in stainless steel blending tanks. The plant can make 25 different types of mixes, which calls for a sophisticated recipe management.

“Ben & Jerry’s batch process is automated and controlled by PLCs, which were just upgraded,” Aiken said. “The butterfat and solids are tested to make sure they are in spec, and if they fall out, then our employees can make adjustments.”

Dry ingredients such as cocoa powder are processed in a separate dry room using super sacks and bulk bag dispensers. This system was installed about four years ago so plant workers wouldn’t have to continuously lift heavy bags.

Any dairy waste is collected and sent back to supplier dairy farms that have a methane digester. The farmers then turn the waste into methane, which generates electricity to fuel their operations.

“This process contributes to the circular economy that helps support the mission statement of the company,” Aiken said.

The process also helps Ben & Jerry’s reduce the amount of wastewater it sends to the city. In 1994, the city gave them a small biochemical oxygen demand permit, only 1,500 pounds per day, and employees had to find ways to not use water for anything except cleaning.


The mix gets the flavor treatment

After each batch is mixed and tested to make sure it meets specifications, the mix is run through the high-temperature short-time (HTST) pasteurizer at 183° F for 26 to 28 seconds. The HTST typically pushes through 4,000 gallons per minute, but its capacity can be expanded up to 4,800 gallons per minute as needed. The base mix comes off at 38° F and goes into an aging tank. It ages in the tank for an average of eight hours before use, but can stay there for up to 72 hours.

“The aging tanks store our base mix, whether it be white, chocolate, low-fat or yogurt,” Aiken said. “From there, it’s pulled to whatever line it’s needed on, into the flavor vats.”

The flavor vats are 600-gallon vats on each line. After the base mix enters the first set of vats, the desired type of flavoring is added. The base is then stored in the vats at a temperature of 40° F before it is sent to the freezer. Ben & Jerry’s ice cream also features low overrun that gives it its creamy texture.

“While it’s being pumped into the freezer, we’re also adding air into the mix, which is the overrun,” Aiken explained. “As it goes through the freezer barrel, it’s not a whole lot different than how you would make ice cream at home.”

The freezer barrel has blades that scrape the sides to mix that ice cream in with the rest of the batch. The ice cream eventually comes out looking like a soft-serve product, with a temperature of 23° F.


Inclusions, variegates are added

During Dairy Foods visit, the plant was mixing up Ben & Jerry’s Phish Food and Everything But The ice cream flavors. Incorporating the iconic chunks and swirls for which the company is known requires a number of steps.

For Phish Food, solid fudge pieces — shaped like fish — are dumped from boxes into the fruit or chunk feeder hopper. These are then pushed into the ice cream, which is then passed through a blender attachment to evenly disperse the chunks. As for how the equipment actually works, that’s a bit of a secret.

“Every piece of equipment we buy, like fruit feeders, is off the shelf, but we customize it,” Aiken said. “It’s a challenge to get in so many chunks.”

Before it is deposited into the pint containers, aka cups, the ice cream gets its swirl or variegate. For Phish Food, the addition is marshmallow, which is pumped through the contherm to cool before it passes through the variegator. Executed correctly, this process results in streaks of marshmallow evenly distributed throughout the pint.

“This speaks to the complexity of our product and the complexity of our process to produce it,” Bellezza said.

When all of the elements have been added in, the mixture is dispensed into the pint containers at a rate of 200 pints per minute. A lidder properly places and pushes lids onto the containers. The pints are then conveyed into the hardening tunnel, which is equipped with fans, to achieve a temperature of -20° F to -90° F. The pints stay there for an hour and 45 minutes, eventually emerging with a core temperature of -10° F. 


Quality is top of mind

Ben & Jerry’s wants its customers to have a great experience every time they open one of its products. To accomplish this mission, the company takes a number of steps before it sends the pints out the door.

In its packaging room, the plant has a stand called the Customer Relevance Quality Station, or the CRQS. An operator pulls random pints off the line every hour and inspects them at this stand to prevent a customer from having a negative surprise.

“From a packaging standpoint, pints are inspected for any damage or soiling on the cup itself and, most importantly, that the tamper ban is there,” Aiken said.

Tamper-evident seals are put onto each pint before they pass through a number of safety checks. For food safety and quality control, checkweighers ensure the pints contain the proper amount of product. Metal detectors, meanwhile, detect anything that should not be in the pints, while a vision system verifies that the tamper-evident seal is on and the lid matches the correct cup (to protect consumers with allergies). In addition, an X-ray machine is used to make sure the right amount of chunks is present throughout all areas of the pints.

“Quality control also performs cutups,” noted Carrie Pontbriand, a food safety specialist at the plant.

For these operations, the pint is cut into four quarters so a worker can visually check to make sure all elements are present and look evenly dispersed. During our visit, quality assurance workers cut a Phish Food pint to make sure the marshmallow and caramel swirls streaked the entire container and the chocolate pieces weren’t all at the bottom or the top.

“A customer should experience no less than satisfaction,” Bellezza said.

After all of the checks, the pints are bundled into packs of eight and palletized via robots.

“At this point, the pints are not touched by human hands again in the production process,” Aiken said.

The robots can stack 240 sleeves on a pallet. These are wrapped and taken to the cold storage space, which can hold 2,000 pallets. They are then loaded onto trucks within 24 hours. 


Worker, food safety is critical

In line with one of Ben & Jerry’s core missions — to make the best product — food and worker safety is always top of mind. That’s why employees pass a corkboard filled with pictures of their children before they enter the plant floor.

“It’s to provide motivation to work safely,” Aiken explained. “We also turn co-founder Jerry Greenfield’s famous saying, ‘If it’s not fun, why do it?’ statement on its head. We say, ‘If it’s not safe, why do it?’”

To promote food safety, employees gear up with the proper hygienic clothing and footwear. They then not only go through a boot scrubber, but also must vacuum their clothing.

When it comes to quality and food safety testing, Ben & Jerry’s swabs for proteins and microbes, performs environmental monitoring, validates its cleaning processes and verifies with testing that nuts are not present where they shouldn’t be.

“Out of the eight top allergens, we use six of them, so that is a challenge for allergen control,” Pontbriand said. 

The plant adheres to a very robust cleaning schedule, especially if any of those six allergens are present in the flavors made that day.

“We also have signs on the floor telling employees where allergens are present in the plant in case they have allergies,” Bellezza said.

Since the St. Albans facility is a hybrid plant, it follows a hazard analysis and critical control point (HACCP) food safety management system — a global standard — as well as requirements under the Food Safety and Modernization Act, which is under the FDA, Pontbriand explained.

“Having both of the terminology has created some confusion among the staff,” she said. “We have both critical control points and preventative controls.”


World-class manufacturing

Employees on the plant floor are comprehensively trained on their equipment and given ownership of it. If there’s a problem or the product is out of spec, therefore, workers are empowered to make the adjustments as they see fit without waiting for approval. 

“Ben & Jerry’s employees are not shy,” Bellezza said. “They are passionate about what they do.”

The plant has a “bottom-up” culture, meaning operators are encouraged to give feedback and communicate problems readily to maintenance. As a result, the company has found that all floor workers are more proactive, resulting in a better manufacturing process. 

“The company is forward-thinking, and the culture’s been like that since the early days,” Bellezza said. “For the last two and a half years, we’ve just been giving it structure and fine-tuning it.”

Ben & Jerry’s refers to its current way of operating as “world-class manufacturing.”

“We’ve found that’s the way to keep problems from reoccurring,” Aiken said.


Preparing for expansion

Because the plant is at capacity and running 24 hours a day, seven days a week, the company has invested $31 million to expand the existing footprint of 135,000 square feet by an additional 46,000 square feet. When the construction project — affectionately called “Extra Chunk” — is completed in 2018, the plant will boast at least six new areas, including a warehouse, a refrigeration room, mix storage space, a packing room, a sugar tank room and a wastewater treatment plant.

“When this plant was built in 1994, we didn’t know what it was going to become,” Bellezza said. “The new spaces will be more efficient and allow us more flexibility in production.”

The plant also will eventually have six filling lines and be the company’s fastest in the United States, filling 300 pints per minute. In addition, it will include a training center and a bigger quality assurance lab to accommodate the additional testing that will be performed.

“It’s an exciting time for us,” Bellezza said. “It’s a proud moment that a lot of hard work has gotten us to.”


At A Glance

Ben & Jerry’s

Plant location: St. Albans, Vt.

Year plant built/opened: built 1994; opened 1995

Additions/renovations: powder handling room  2014; chemical storage room 2013; upgraded mix room 2015; and Project Extra Chunk 2017

Size: 135,000 square feet

Acreage of the site: 42

Number of production employees in the plant: About 250

Products made and formats: Pints, mini cups (4-ounce) and bulk; pint slices (3-ounce bars)

Total processing capacity: 528,000 pints a day 

Number of shifts: 3 shifts; 24/7 or 24/5, depending on volume

Number of filling lines/types: 4   

Warehouse size: 1,900 spots in cold storage; 9 bays 


Photos by Vito Palmisano