Its delicious, but how did it come to be? Ben had been pondering the lack of a good marshmallow ice cream for years. Most attempts at marshmallow were wispy. You can see the white streaks, but you can't taste them, you can't feel them, you can't experience the true glorious marshmallowness of it all, Ben remembers. As the wheel started turning on the collaboration, Ben saw an opportunity to solve the marshmallow conundrum once and for all. Starting with a base of rich chocolate ice cream, he and our flavor gurus started bringing the band test tubs of the evolving concoction. Weve done flavors with other artists and entities, but nobody was more involved in creating the flavor than Phish was, Jerry says. The band was instrumental, for example, in calling for caramel swirl, an addition that pushed the flavor over the top. All of Ben and Jerry's ice cream is made with non-GMO sourced ingredients and cage-free eggs. Ben and Jerrys uses responsibly sourced packaging.