In 1977 lifelong friends Ben Cohen and Jerry Greenfield completed a correspondence course on ice cream making from the Pennsylvania State University.
On May 5, 1978, with a $12,000 investment the pair opened an ice cream parlor in a renovated gas station in downtown Burlington, Vermont.
In 1979, they marked their anniversary by holding the first-ever free cone day, now a nationwide annual celebration.
In 1980, Ben and Jerry rented space in an old spool and bobbin mill on in South Champlain in Burlington and began packing their ice cream in pints.
In 1981, the first Ben & Jerry’s franchise opened on route 7 in Shelburne, Vermont .
In 1983, Ben & Jerry’s ice cream was used to build “the world’s largest ice cream sundae” in St. Albans, Vermont. The sundae weighed 27,102 pounds.
In 1984, Häagen-Dazs tried to limit distribution of Ben & Jerry’s in Boston, prompting Ben & Jerry’s to file suit against the parent company, Pillsbury, in its now famous “What’s the Doughboy Afraid Of?” campaign.
In 1985, the Ben & Jerry’s Foundation was established at the end of the year with a gift from Ben & Jerry's to fund community-oriented projects; it was then provided with 7.5% of the company’s annual pre-tax profits.
In 1986, Ben & Jerry’s launched its “Cowmobile”, a modified mobile home used to distribute free scoops of Ben & Jerry’s ice cream in a unique, cross-country “marketing drive”—driven and served by Ben and Jerry themselves. The “Cowmobile” burned to the ground outside of Cleveland four months later, but there were no injuries. Ben said it looked like “the world’s largest baked Alaska .”
In 1987, Häagen-Dazs again tried to enforce exclusive distribution, and Ben & Jerry’s filed its second lawsuit against the Pillsbury Company.
1992, Ben & Jerry’s joined in a co-operative campaign with the national non-profit Children's Defense Fund; the campaign goal was to bring children’s basic needs to the top of the national agenda. Over 70,000 postcards were sent to Congress concerning kids and other national issues.