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Waterbury, Vt.; $4 per adult; benjerry.com/about-us/factory-tours

A short film at the beginning of the humor-infused tour reveals it was a $5 correspondence course in ice cream-making and a $12,000 investment that was behind the first “scoop shop” the partners opened in a renovated gas station in Burlington, Vt.

Guided tours of the flourishing business include a stop at the “flavor lab” where guests are offered a scoop of the sample of the day.

(Caution: the sample may be described as a broccoli flavor with kidney bean chunks with a swirl of cheddar cheese, before the real treat is unveiled.)

A picket fence enclosed “flavor graveyard” on the factory grounds contains tombstones for discontinued flavors. The epitaph for Rain Forest Crunch reads:

1988-1988

With aching heart & heavy sigh

We bid Rainforest Crunch goodbye.

That nutty brittle from exotic places

Got sticky in between our braces.

The factory store sells ice-cream-flavored lip balms and combination “pint locks” that protect Ben and Jerry’s ice cream from unauthorized eaters.