jolly pumpkin

Detroit, Michigan–The craft beer world’s most infamous feud has sparked a collaboration brew that no one ever anticipated.

In 2014, Ron Jeffries, owner and master brewer of Jolly Pumpkin Artisan Ales, hosted Mikkel Borg Bjergso of Mikkeller at his Dexter, Michigan brewery to work on a few collaborative brews.  Later that year, Mikkel’s identical twin, Jeppe Jarnit-Bjergso of Evil Twin Brewing, stopped in to work on a few new creations.

Then the unthinkable happened; Jeffries blended the Bjergso brothers’ beers, despite the twins’ complicated relationship.

The resulting brew is called Hamajang—Hawaiian slang for “that’s messed up, bro.”

jolly pumpkinAll three collaboration brews are available now at Jolly Pumpkin’s Detroit, Michigan tap room:


Sea Buckthorn Fandango
(5.7% abv.) Sour Ale with Sea Buckthorn Juice

This collaboration with Mikkel Bjorg Bergso of Mikkeller Brewing was brewed in August 2014 and spent 1 year 4 months in oak barrels.

Innovatorman (6.8% abv.)  Sour Ale with Strawberries

This collaboration with Jeppe Jarnit-Bergso of Evil Twin Brewing and Charles Psenka from Leelanau Brewing Company was brewed in September 2014 and spent 1 year 3 months in oak barrels.

Hamajang This blend of Sea Buckthorn and Innovatorman combines the work of the Bjergso twins (perhaps without their knowledge) for the first time.

Gravel Bottom Craft Brewery