Underground Mountain Brown
Founders Brewing Company

Underground Mountain BrownUnderground Mountain Brown
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Brown Ale - American
Ranked #1
Ranked #581
4.36 | pDev: 7.11%
Founders Brewing Company
Michigan, United States
Underground Mountain BrownUnderground Mountain Brown
Notes: Barrel-Aged Sumatra Mountain Brown

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 comes 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.

30 IBU
Reviews: 207 | Ratings: 635 | Log in to view all ratings and sort
Photo of tp1962
tp1962 from Illinois

5/5  rDev +14.7%
look: 5 | smell: 5 | taste: 5 | feel: 5 | overall: 5

Look very dark brown but can still see through glass
Smell distinct coffee and chocolate
Taste coffee, sweet chocolate and bourbon
Feel mild carbonation and goes down smooth
Overall this is great beer and is deserving of its rating!

Sunday at 08:45 PM
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cbutova from Massachusetts

4.65/5  rDev +6.7%
look: 4.5 | smell: 5 | taste: 4.5 | feel: 4.25 | overall: 4.75

Gotta say I was beyond thrilled to see this four pack at a local store today. Brown ales are criminally underrepresented and considering what Founders does with barrels and coffee it just sounds like a slam dunk, let's see.

A- Chalice takes on a deep mahogany brew that has some deep crimson hints at the edges. An off white silky and creamy head forms to a finger high with nice retention. Large sheets of thin lace start right away with impressive coverage as sips are taken.

S- The barrels and coffee of KBS and Breakfast stout are brought to mind right away but you notice right away this is a bit more subtle without the intense roast stout base. The barrel really is a star here with whiskey, oak, soft vanilla and some peppery boozy hints. Balancing that out are medium-dark roast coffee and plenty of malts giving nutty, toasty, slight roast, caramel, toffee and chocolate.

T- No surprise since it is Founders but the coffee flavor in this brew is wonderful. Considering how it plays off the sweetness, malt flavors, vanilla from the barrel and slight booze it really kind of weaves the flavor profile together as one. The beer on the whole is fairly simple but here that is a great strength and the flavor profile is amazingly balanced. Spicy whiskey, dark roast coffee, milk chocolate, Bourbon oak, toasted oak, nuttiness, toast, slight roast, cola and caramel.

MF- Medium bodied brew with a foamy and frothy texture. The carbonation is at a moderate level and the finish has some warming and bitterness.

Outstanding aroma bringing everything that can be great about coffee, malts and Bourbon barrels. The flavor follows up on that and the coffee usage in this beer overall is downright memorable. The body feels just a bit thinned out by the booze but that is a minor complaint because this is a showcase of how good Founders is with coffee and barrel aging.

Oct 12, 2020
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Ohknows from Nevada

4.25/5  rDev -2.5%
look: 4.25 | smell: 4.25 | taste: 4.25 | feel: 4.25 | overall: 4.25

Mathis beer pours a nice dark black color with little head, slightly brown-ish.

The smell, the taste is awesome! The coffee taste is on point , not over powering like it other beers. I am also getting a hint of chocolate and my favorite part about beers with higher ABV, you can’t taste the alcohol ( which can be a bad thing at 11%).

I am upset I only picked up a single and not the 4 pack.

Nicely done!

Sep 26, 2020
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mikeinportc from New York

4.54/5  rDev +4.1%
look: 4.25 | smell: 4.5 | taste: 4.5 | feel: 4.5 | overall: 4.75

Bottled 8/27/20. Let warm to room temp - 54F . (I looked ;) )

Very,very dark brown - not quite black -, with a 1/2-finger of fine tan head, that leaves a streaky sheet of lacing after every sip.

Smell is fresh, cold coffee, as from my French press, before I heat it, plus a bit of brownie batter, and a hint of bourbon/alcohol. Very inviting! :)

Taste is lightly-sweetened chocolate, a little black coffee, plus some spicy vanilla+roasted nuts+wood+earth from the bourbon barrel.

Feel is slick, lightly-syrupy, with light, very,very finely sharp carbonation bit on the finish, that lingers a bit. Some internal, and back-of-the-palate warming. Given the recent bottling date , it's verrrry smooth, and the heat is surprisingly muted. Imagine that this aspect will only get better with age.

Overall, just a treat! If you like coffee,chocolate, and malty brews, don't hesitate to grab this.
Not cheap, but given what it is, quite inexpensive, and very much worth it. :)

Sep 22, 2020
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Wasatch from Colorado

4.5/5  rDev +3.2%
look: 4.5 | smell: 4.5 | taste: 4.5 | feel: 4.5 | overall: 4.5

12 oz. Bottle
2020 Release
Bottled On: 08.27.20

Poured into a tulip glass a very nice dark brown/black color, with some pretty nice carbonation, with a pretty nice thick/creamy one-finger tan head, which also leaves a pretty nice medium size creamy island, and some pretty nice sticky lacing behind. The nose is malty, hoppy, with some pretty nice chocolate/toffee, pretty nice coffee note, with a nice touch of vanilla, licorice, bourbon, oaky. The taste is very nice, malty, hoppy, with some really nice chocolate/toffee notes, really nice touch of coffee, nice vanilla sweetness, licorice, with a really nice bourbon/oak note. Full Body, ABV is hidden very nicely, a pretty complex brew, with a nice dry/bitter finish. Overall, a very nice brew! Glad to see it around here.

Sep 20, 2020
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SpeedwayJim from New York

4.22/5  rDev -3.2%
look: 4.5 | smell: 4.25 | taste: 4.5 | feel: 3.25 | overall: 4

12oz. beer into a Brooklyn Brewery snifter.

A real luxurious looking beer. Dark with a fluffy head. Nose is brown sugar, maple syrup, booze, a touch of espresso and mocha. This smells delicious. Beer opens chocolate, brown sugar, brownie and cocoa. More brown sugar and cookie in the middle with layers of espresso, molasses and lactose. Rich, creamy and sweet. End is more boozy sweetness. Maple and coarse brown sugar in the aftertaste. Again, this really blows me away for the style. Body is medium with ample carbonation. A bit aggressive on the palate for me and goes down soft, pretty subtle.

The nose and flavor are extremely on point here but I wish the feel was just a bit more viscous and richer. Definitely worth trying though.

Sep 15, 2020
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Slatetank from Pennsylvania

4.14/5  rDev -5%
look: 4.5 | smell: 4.25 | taste: 4 | feel: 4 | overall: 4.25

On tap at Federal Taphouse Harrisburg
Opaque deep walnut brown with lasting tan head with very fine bead
The smell has both bourbon and dark malt with sweetened dark roast coffee
The feel is rich yet robust with coffee bitterness and woody bourbonesque alcohol drying as it finishes
The flavor begins with sweet malt and and transitions to dark roast sumatra with light acidity coming through and wood with vanilla and bourbon brings out a alcohol dry element as it finishes with a bang
This might be a strong contender for best brown ale I have had with bourbon and coffee adding a nice amount of icing on the cake that is underground mountain

Sep 13, 2020
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trevormajor from Ohio

4.54/5  rDev +4.1%
look: 4.5 | smell: 4.25 | taste: 4.75 | feel: 4.5 | overall: 4.5

12 oz bottle served at around 48-50 degrees about 13 months from bottle date.
Nice full bodied look for a brown ale, taste is incredible. Coffee taste is still strong, great bourbon flavor on the finish. I've got 3 if these left and will be interested to see how they age.

Sep 02, 2020
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zeff80 from Missouri

4.31/5  rDev -1.1%
look: 4 | smell: 4.25 | taste: 4.5 | feel: 4 | overall: 4.25

12oz bottle. Poured out a dark, dark brown color with a small, khaki-colored head of foam. It left minimal lacing. It smelled of coffee, oak, bourbon, vanilla and dark chocolate. Strong roasted coffee taste with a punch of bourbon, vanilla and charred oak.

Aug 24, 2020
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Scotchboy from Idaho

4.05/5  rDev -7.1%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4.25

Nitro pour on-tap in Meridian ID.

A: Mostly opaque brown with red highlights and a creamy (nitro) off-white head.

S: Moderately strong aromas of roasty malt and caramel/coffee.

T & MF: Coffee and caramel lead on the palate, impressions of oak barrels and earthy/fruity coffee, milk chocolate as well...smooth nitro body with a nice level of creaminess.

O: I can see why this one is rated as high as it is for a brown ale. I love BA beers and coffee browns, so this is right up my alley as well. I'm not sure it needed the nitro, and where that leaves the aromas and flavors if they were muted somewhat on this pour, but overall this is solid.

Jul 08, 2020
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drdiesel9483 from Ohio

4.41/5  rDev +1.1%
look: 4.5 | smell: 4.75 | taste: 4.25 | feel: 4.5 | overall: 4.25

Look - dark dark dark brown with a great tan head and sticky lacing
Smell - caramel coffee roasted malts
Taste - caramel roasted malts with some coffee slight bourbon booze taste
Feel - full body light carb slight creamy, really nice
Overall - really tasty complex imperial brown. Love the vanilla coffee caramel notes.

Jun 13, 2020
Photo of just1cho
just1cho from California

4.25/5  rDev -2.5%
look: 4.25 | smell: 4.25 | taste: 4.25 | feel: 4.25 | overall: 4.25

*Poured into a Teku glass from a 12oz bottle at 50F for review. Poured the rest into a nonic pint glass.*

*Bottled on: 7/29/19*

*Drank on: 4/28/20*

Poured a deep brown, almost stout-like but not quite as dark. Had about a finger thick khaki colored head with some decent amount of retention. Not super impressive to look at, but was satisfying none-the-less as it closely resembled a stout, can't go wrong with that.

The aromas were primarily herbal dark coffee (Sumatra) and sweet bourbon, with the coffee being slightly more dominant than the bourbon. Although these two aromas were the primary aromas, I was also able to pick up of its other characteristics such as pine nuts, roasted barley malts, biscuits, and some vague notes of dark chocolate and vanilla. What I think of when I smell this is sort of a bourbon-flavored boozy Tiramisu. You get primarily dark coffee and bourbon, but there is an almost creamy element to its aroma.

Although the aroma was more coffee forward than bourbon, I got pretty much the opposite when tasting it. It was very boozy and warm in the front, almost a little too much for me. It mellowed out a bit towards the middle where I finally got some of the herbal coffee notes as well as some bitter dark chocolate and roasted barley. Then the bourbon came back in the end where it left a semi-lingering bitter aftertaste.

It was smooth with a medium body. Had a little bit of carbonation to it, but it wasn't flat by any means. For the amount of alcohol in it, I definitely thought this was pretty smooth and easy to drink. Take your time when drinking with this one, it has a slight burn to it but it's not overwhelmingly boozy where it won't go down easy. I would pair this with some food with strong and robust flavors, maybe some sausages.

Take your time, and enjoy!

Apr 29, 2020
Photo of NickSMpls
NickSMpls from Washington

4.45/5  rDev +2.1%
look: 4 | smell: 4.5 | taste: 4.5 | feel: 4.25 | overall: 4.5

Wonderful aromas of coffe and oak waft up from dark brown pour, light head and light lacing. Take a sip and expresso beans with dark cacao notes come over a nicely done roasted malt. The stiff 11.9% is lurking just below the surface, but contributes no alchohol burn. This is a very,very tasty brown ale.

Apr 20, 2020
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twage04 from North Carolina

4.64/5  rDev +6.4%
look: 4.5 | smell: 4.75 | taste: 4.5 | feel: 4.75 | overall: 4.75

Pours a dark murky brown with medium carbonation. Aroma is of coffee/mocha, hint of bourbon. Taste is much the same. Very roasty and bitter but smooth and easy to sip through. I'm not a coffee drinker but if I don't mind some beans thrown into a beer this tasty.

Apr 12, 2020
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maximum12 from Minnesota

3.62/5  rDev -17%
look: 3.5 | smell: 4 | taste: 3.5 | feel: 3.5 | overall: 3.5

Quarantine day sixteen take two: had this a few times already, but down to the last one, which is becoming common already. 16 oz. bottle.

Brown, like in the name, with a nose that brings strong coffee, light bourbon, & a hard knot of brown sugar. Nice start.

Underground Mountain Brown echoes the nose, with each component in danger of a PED suspension. Strong barrel, strong coffee that breaks free of mere roast, with a bit of oak, earth, & a finishing touch of char. One can feel but not taste the alcohol.

One of the few ‘brown’ ales that can withstand the barrel, probably because it’s been on so many steroids it doesn’t resemble one any more. Good beer.

Apr 03, 2020
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stortore from Illinois

4.27/5  rDev -2.1%
look: 4 | smell: 4.5 | taste: 4.25 | feel: 4 | overall: 4.25

12 ounce bottle into a snifter. Bottled 8/8/19, had 9/26/19.

Pours a dark brown, semi opaque, with a one inch foamy head with decent amount of foamy lacing. The aroma begins with a big jolt of coffee, then fudge, chocolate, malt, vanilla, caramel- more as it warms, light bourbon, light char, a little oak. The flavor starts with almost as big a hit of coffee, then chocolate, fudge, malt, some bourbon- more as it warms, vanilla, some caramel, light oak, some hop bitterness on the finish. Smooth, a very good medium to full body, well carbonated.

Great and plentiful coffee with many good complimentary aromas and flavors. The barrels show in the flavor when warm, but they steal a little of the fullness of the body. Very enjoyable, but expected this to be an upgrade from the base beer, and it’s not. Worth a purchase.

Mar 27, 2020
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secondtooth from Indiana

4.27/5  rDev -2.1%
look: 3.5 | smell: 4.5 | taste: 4.25 | feel: 4.25 | overall: 4.25

Appearance: Deep brown, nearly black, with ruby highlights and medium-sized khaki suds and limited lace.

Aroma: Rich coffee cocoa bourbon vanilla oak. Hint of fruit. Niiiiice.

Taste: Big and thick, Heavy bourbon on top of roasty sweet malts and coffee. Finishes with an oaky bourbon sweet burn. Solid brew for a cold night.

Mar 24, 2020
Photo of Radome
Radome from Florida

4.71/5  rDev +8%
look: 4.5 | smell: 4.75 | taste: 4.75 | feel: 4.5 | overall: 4.75

Had on tap at The Yard House, Summerlin in Las Vegas, NV. Great espresso roasted coffee and bourbon barrel in the aroma. Flavors emphasize the bourbon character. Creamy, alcoholic body improved as it warmed and breathed.

Mar 14, 2020
Photo of RyanK252
RyanK252 from California

4.29/5  rDev -1.6%
look: 4.5 | smell: 4.25 | taste: 4.25 | feel: 4.5 | overall: 4.25

Bottle poured into a Founders Brewing Co snifter

A: Pours dark chestnut brown, nearly black, with a frothy tan head that settles to a light layer and laces beautifully.

S: Roasty, toasty, coffee, chocolate, oak, vanilla, bourbon, slightly earthy, a touch of spice, and some dark sugar sweetness.

T: Toasty, roasty, smooth coffee, bourbon, vanilla, peppery spice, earthy, nice touch of oak, and brown sugar sweetness. Just a touch of alcohol pokes through as it warms.

M: Full body, moderate carbonation, creamy, with just a touch of warmth. Super drinkable for nearly 12%.

O: I do love a good brown ale and this one is taken to another level. Everything works together really well. Founders showing off their barrel aging prowess again.

Mar 11, 2020
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NYNorseman from New York

4.79/5  rDev +9.9%
look: 4.75 | smell: 5 | taste: 4.75 | feel: 4.5 | overall: 4.75

This beer captures the mojo of the caves it ages in under Grand Rapids...and it comes out a year later in all of its delicious glory! This American brown ale is boozy bourbon tasting and seeped in Sumatran Coffee and the 11.2 abv works perfectly. This beer is malty and complex and I think it's very deserving of its #1 ranking among American brown ales. Well done Founders!

Mar 10, 2020
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jzeilinger from Pennsylvania

4.33/5  rDev -0.7%
look: 4.25 | smell: 4.25 | taste: 4.5 | feel: 4 | overall: 4.25

A - Dark brown pour with light cream colored lacing that's dense, creamy, and clings to the sides of the glass.

S - Bourbon, coffee, light char, oak, and delicate vanilla.

T - Char, dark roasted malt, bourbon, oak, vanilla, and coffee. The coffee hits up front followed with oak tannin and a quick hit of vanilla. Finishes with a lingering bourbon, cherry, vanilla, and some booziness.

M - Thick with a soft texture and minimal warming on the way down.

O - This is a fantastic barrel aged beer from Founder's.

Mar 07, 2020
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entheos from California

4.25/5  rDev -2.5%
look: 4.25 | smell: 4.25 | taste: 4.25 | feel: 4.25 | overall: 4.25

Excellent beer and if I have to enter my explanation again after this review, I will quit writing to this Beer Advocate web site. It’s just incredulous that I need to fight to keep an opinion about beer. It’s just beer, damn it!

Mar 07, 2020
Photo of Prager62
Prager62 from Colorado

4.04/5  rDev -7.3%
look: 4.25 | smell: 4 | taste: 4 | feel: 4.25 | overall: 4

A 12oz. bottle dated 08/07/19 poured in 12oz. Founders Cellar Series stemmed glass. Refrigerated since purchasing it in early January.

The pour is a medium colored thin brown that produces a generous finger of creamy tan foam. It lingers quite long before settling to a thick ring revealing heavy lacing. The smell is coffee forward with some brown sugar sweetness, a little char and a hint of bourbon. It tastes very coffee forward with dark roast followed by some slightly sweet brown sugar. There is a little smokey char and the bourbon is very subdued. I'm detecting some oak in the finish as I drink down this bottle. The feel is thin but rather silky smooth making this 11.9% beer quite easy to drink.

A very pleasant barrel aged coffee brown. Perhaps a bit too easy on the barrel for my liking, but still enough there that I'd gladly buy it again down the road.

Feb 22, 2020
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fountainofyouth from District of Columbia

4.21/5  rDev -3.4%
look: 4.25 | smell: 4.5 | taste: 4 | feel: 4.25 | overall: 4.25

Deep, dark brown that's a little lighter at the edges. Off-white head. Aroma is vanilla oak barrel, milk chocolate, ground nuts, and cinammon. Taste is nutty and a little spicy. Brown malt, toasted bread flavors. Tiny hints of coffee. Smooth and pleasant. Light-bodied feel with a little bit of a rye kick. Very good, but was expecting a little more coffee.

Feb 16, 2020
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penguinsgoboom from California

4.34/5  rDev -0.5%
look: 4 | smell: 4.25 | taste: 4.5 | feel: 3.75 | overall: 4.5

A: Pours a dark maroon brown. Nice creamy head. Decent lacing

S: The bourbon definitely stands out. A nice chocolate, espresso, a good roast,

T: This beer starts low and stays low. A smooth baritone of espresso to be broken up by the bourbon peeping up at the end.

O: Stickier and oilier than I thought. This is a rich and well done

Feb 04, 2020
Underground Mountain Brown from Founders Brewing Company
Beer rating: 96 out of 100 with 635 ratings