On Tap


Underground Mountain Brown

Imperial Brown Ale Brewed with Coffee and Aged in Bourbon Barrels

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Underground Mountain Brown is the harmonious drinking experience only achieved when our imperial brown ale, earthy Sumatra coffee and a year aging in caves below Grand Rapids come together. A team of malts complement the bold Sumatra coffee perfectly, while time spent immersed in oak creates layers of depth and complexity. A celebration of the barrel, the bean and everything in between.

On Tap


Image of Barrel Aged Series logo Founders Underground Mountain Brown in a bottle and poured in a beer glass
Snifter beer glassDraft Beer bottles4-Pack

Masterfully Crafted. Patiently Perfected.

“It’s up to us to really diversify, we can’t just be limited to stouts… we have to push that envelope. You put the right beer in the right barrel and you’re going to create some pretty interesting flavors…” – Jeremy Kosmicki, Brewmaster

Latest Checkins

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Boban S. is drinking Underground Mountain Brown at Bob's penthouse
Sep 29 @ 10:25 am
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jon s. is drinking Underground Mountain Brown at Mos Eisley Cantina
Sep 29 @ 12:27 am
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Joseph M. is drinking Underground Mountain Brown at Untappd at Home
Sep 29 @ 12:04 am

Are you old enough for this adventure?

( At least 21 years old )