Samuel Adams Kosmic Mother Funk (KMF) Grand Cru | Boston Beer Company (Samuel Adams)

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Samuel Adams Kosmic Mother Funk (KMF) Grand CruSamuel Adams Kosmic Mother Funk (KMF) Grand Cru
191 Ratings
Samuel Adams Kosmic Mother Funk (KMF) Grand CruSamuel Adams Kosmic Mother Funk (KMF) Grand Cru

Brewed by:
Boston Beer Company (Samuel Adams)
Massachusetts, United States

Style: American Wild Ale

Alcohol by volume (ABV): 6.50%

Availability: Year-round

Notes / Commercial Description:
Kosmic Mother Funk is a one-of-a-kind Belgian ale fermented with multiple micro-organisms including Brettanomyces, Lactobacillus and other wild critters found in the environment of our 150 year old brewery. KMF is aged in large oak barrels which impart unique flavors into the KMF as it develops its flavors for over a year. Wild yeast and different bacteria in the tuns impart unique spicy, fruity, and bright tart characters to the beer. The porous character of the oak also allows air to slowly seep into the beer during aging and this long slow micro-oxidation through the wood smooths out harsh flavors.

KMF is the backbone of all of our Barrel Room Collection beers and is blended, at varying amounts, into each of the five Belgian inspired brews that make up this collection. Its wild, funky character creates a new depth and spectrum of complex flavors from earthy and spicy to floral and sweet.

To showcase the unique character of this brew, we’re introducing Kosmic Mother Funk Grand Cru this year for the first time. On its own, KMF is tart, funky, and complex with notes of dark fruits, cherry, cocoa & vanilla. To bring together these flavors we’ve added a small amount of Belgian candi sugar to add a bit of smoothness and hint of sweetness to this vintage.

User Ratings & Reviews
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Ratings: 191 |  Reviews: 20
Reviews by RichD:
Photo of RichD
4.36/5  rDev +7.7%
look: 3.75 | smell: 4.5 | taste: 4.5 | feel: 4 | overall: 4.25

More User Reviews:
Photo of LambicPentameter
4.31/5  rDev +6.4%
look: 4 | smell: 4.25 | taste: 4.5 | feel: 4 | overall: 4.25

Was lucky enough to enjoy this beer that rarely makes it out of Boston when they did a "world" tour this past fall/winter. Kansas City's growing beer scene banded together and voted ourselves in to the tour as the final fan-voted stop. Enjoyed at Bier Station as part of the tour stop kickoff. Poured into a large Belgian-style tulip glass.

Appearance (4.0) - Nothing particularly mind-blowing to start. A dark, ruddy bistre brown hue that is dark enough that I can't really tell if it's hazy or not. Atop the body lies a lazy half finger of ecru foam that dissipates pretty quickly, leaving no trace that it ever existed at all--no film, no lacing, nothing.

Smell (4.25) - First whiff gives off a nice blend of complementary notes, with some medium and dark fruit along the lines of black cherry, date and red plum, but the undertone supporting all of it is a vein of balsamic acidity and a slight pinch of tartness. The aroma suggests that what I'm about to taste will have a sweet and sour characteristic.

Taste (4.5) - The nose did not let me down, giving quite a good approximation of what was in store for me. The same fruity sweetness is here, with black cherry and plum leading the way, with perhaps some hints of black currant that I didn't get much of from the aroma. However, the tartness is much more present, providing an even balance of balsamic vinegar to cut the sweetness and push this beer into entirely unique territory. I'm not joking when I say that I'd be slightly curious to mix this with some olive oil and dip some some French bread into it. The taste also reveals a vinous character that I didn't explicitly detect in the smell, with notes of red wine and oak.

Mouthfeel (4.0) - Medium-bodied and low carbonation, with a slightly slick, coating feel on the tonuge and a slight pinch of tartness on the tastebuds. Semi-sweet finish.

Overall (4.25), this is probably my favorite Sam Adams beer to date. I've never had the opportunity to try any of the Barrel Room Series beers that all use KMF as a base to varying degrees, but trying this one on its own has certainly piqued my curiosity. It drinks like a unique twist on a Flanders Oud Bruin and I would love to have some more.

 2,208 characters

Photo of Stinkypuss
4.31/5  rDev +6.4%
look: 4.25 | smell: 4.5 | taste: 4.25 | feel: 4.25 | overall: 4.25

LOOK: Very deep ruby red. Close to amber/brown in a large, non stemmed glass. Nice clarity and excellent overall look.

SMELL: Wine like sour aroma carrying berries and cherry, though I believe this ale is unfruited. Complex intoxicating aroma broadly in the flemish oud bruin style.

TASTE: A nice sourness going on, lacto seems heavy, cherry is unmistakable from the yeasts wow. Very nice tasting brew that is ample sour but not over the top. The oak used in the barrels was actually imported and the aging vessels built on premise in Boston Beer Co. which is cool. Bolivian oak if I am not mistaken, which gives the barrels a light vanilla flavor though the oak never held any liquid before this beer. Still acetic notes of red wine vinegar are much stronger. Complex with sour and malt notes and a hint of slight vanilla and char in the finish.

FEEL: Full bodied, yet still lively and not heavy on the tongue. The bubbles carried the flavor well throughout the brew. Really nice, meant to be sipped and savoured.

OVERALL: A solid sour beer with large strength and good depth of flavor. I can see why this is a choice blending agent for the Stoney Brook Red and the barrel room series. That being said this is much better than those and a beautiful beer straight up. Imagine a Rodenbach with a slightly more toasty malt flavor and an ever so subtle hint of vanilla. Drinkable for an extreme beer.

 1,420 characters

Photo of TimBeaulieu
4.26/5  rDev +5.2%
look: 4.5 | smell: 4 | taste: 4.5 | feel: 3.75 | overall: 4.25

Photo of tigg924
3.74/5  rDev -7.7%
look: 3.75 | smell: 4 | taste: 3.75 | feel: 3.5 | overall: 3.5

Had on tap at Flynn's Cedarville. Wow is this sour. Pours clear, dark brown with 1/2 head and moderate carbonation. Taste is plum, dark cherry, light wood, and tons of sour mix. Very tasty but truly a sipper. Glad I had a chance to try it, but I do prefer others in the style.

 281 characters

Photo of jtladner
4.25/5  rDev +4.9%

Photo of JamesStreet
3.94/5  rDev -2.7%
look: 3.75 | smell: 4 | taste: 4 | feel: 4 | overall: 3.75

Photo of NeroFiddled
4.5/5  rDev +11.1%

Samuel Adams Kosmic Mother Funk
On tap @ Pinocchio's Restaurant, Media, PA

I was starting to worry that Boston Beer wasn't keeping up with the changes in the beer world these days, thinking that maybe they'd fall behind because people have tired of their regular beers, and even their seasonal offerings, but this changes everything!!! WHAT A BRILLIANT BEER! It's got a lot of funkiness to it. It's got lactobacillus, it's got Brettanomyces, and it's got a bit of swagger to it as well, yet it's all tightly wrapped up in a clean, focused, and still malty package. It's sour/sweet with lots of red fruit, dark skinned fruit, and wet leather. Remarkably drinkable, interesting, and complex.

 690 characters

Photo of Roguer
4.2/5  rDev +3.7%
look: 3.75 | smell: 4.25 | taste: 4.25 | feel: 4 | overall: 4.25

Extremely dark and thin appearing brew, like a BSDA. Minimal head.

Immediate Brett funk on the nose, but it's blended with an unmistakable sour edge, not unlike that found in Flanders red ales.

Flavor follows: it's immediately sour up front (again like a Flanders), but balanced against toasty, grainy malts and a very rustic funk from the Brett. Excellent balance of complex flavors. Delicate brew.

 401 characters

Photo of schmidtmattsays
3.5/5  rDev -13.6%

Photo of cubbyZilla
4.09/5  rDev +1%
look: 3.75 | smell: 4 | taste: 4.25 | feel: 4 | overall: 4

Photo of HuntDaddy540
4.25/5  rDev +4.9%

Photo of earlholman
4.25/5  rDev +4.9%

Photo of GRG1313
4.25/5  rDev +4.9%
look: 4.25 | smell: 4.25 | taste: 4.25 | feel: 4.25 | overall: 4.25

Photo of dexterk1
3.46/5  rDev -14.6%

Photo of Durdz
4/5  rDev -1.2%

Photo of apasternak
3.5/5  rDev -13.6%

Photo of waddellc2
3.5/5  rDev -13.6%
look: 3.5 | smell: 3.5 | taste: 3.5 | feel: 3.5 | overall: 3.5

Photo of zp6167a
4.5/5  rDev +11.1%

Photo of sahd-1
4.25/5  rDev +4.9%
look: 4 | smell: 4 | taste: 4.5 | feel: 4 | overall: 4.25

Photo of StormAles
4/5  rDev -1.2%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4

Photo of macesq
4.25/5  rDev +4.9%

Photo of Moses_Malone
3.5/5  rDev -13.6%

Photo of RiverCityBeerGuy
4.96/5  rDev +22.5%

Photo of DavidHume
4.25/5  rDev +4.9%

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Samuel Adams Kosmic Mother Funk (KMF) Grand Cru from Boston Beer Company (Samuel Adams)
Beer rating: 4.05 out of 5 with 191 ratings