Kosmic Sour
Boston Beer Company (Samuel Adams)

Kosmic SourKosmic Sour
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American Wild Ale
Ranked #1,587
Ranked #45,285
3.34 | pDev: 20.66%
Boston Beer Company (Samuel Adams)
Massachusetts, United States
Kosmic SourKosmic Sour
Reviews: 29 | Ratings: 68 | Log in to view all ratings and sort
Photo of neenerzig
3.85/5  rDev +15.3%
look: 4 | smell: 4 | taste: 3.75 | feel: 4 | overall: 3.75

Got a 12 oz bottle of this to try. Poured into one of my tulip glasses. This beer pours a mainly clear, light copper color with a white head that's about an inch thick when first poured with lots of streams of little bubbles fairly rapidly and continuously rising to the beer's surface. Settles eventually to a thin to medium sized ring lining the inside of the glass. Aromas of some bready malts, oak, and some yearly, barnyard funk notes. The taste is pretty much the same, with some toasted bready malts and wheat that gives way to some oak, funky, and slightly sour flavors. A hint of green apple tart as well. Not bad, in fact fairly good, but this needs all the flavors overall to be stronger. This beer's flavor profile doesn't reach its full potential. There especially isn't enough of a bit with the sour, funk, and tartness. Has a somewhat crisp, slightly smooth, slightly prickly, medium bodied mouthfeel with moderate carbonation. Not bad, but not great. Just pretty okay all around.


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Photo of buschbeer
3.11/5  rDev -6.9%
look: 4 | smell: 3.5 | taste: 3 | feel: 2.75 | overall: 2.75

12 FL. OZ. bottle
Served in a perfect pint glass

This beer pours a brilliant amber hue with golden highlights. It is topped with a couple inches of beige head that leaves decent lacing.

It has a floral, soapy aroma. There are hints of citrus and green apple. I get some pear.

It tastes like a Belgian pale ale. I get some spiced pear. There are hints of green apple. It is barely tart.

Medium bodied with a watery mouthfeel

I've had Kosmic Mother Funk before. This is like an extremely watered down version of it. It's like a green apple radler.

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Photo of BEERchitect
3.49/5  rDev +4.5%
look: 3.75 | smell: 3.5 | taste: 3.5 | feel: 3.25 | overall: 3.5

In the traditions of Kriek, Flanders and Gose, the Boston Beer Company tests the tart palate with hints of dark cherry fruits on a slightly wine-like base for a simplified sourness.

Pouring a rusty ruby color, the hazy Kosmic Sour builds a loose and short soapy foam stance ahead of a cherry laced sourness and a fruitiness that tingles the jaws slightly. A cracker-like sweetness ensues along with hints of pastry, cobbler and wheat.

As the flavors roll along, the taste of cherry invites other flavors of red apple, rose wine, lime, lemon and gooseberry until eventually taking on a watered down taste of cherry sodas. A faint and peppery bitterness contends with the light linger of sweetness while its tart, nearly sour finish is shy of complete.

Medium bodied but fuller for sour ale, the beer has a balance that’s sure to appease those who are testing the acidic waters but for the fans of full-blown sour ales, this offering falls just short.

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Photo of JohnnyEd
3.19/5  rDev -4.5%
look: 3.25 | smell: 3.5 | taste: 3 | feel: 3 | overall: 3.25

Purchased a 6 pack at the store - it looked good. Pours a little flat, not much of a head. Color is amber, almost copper in color. Smells like it's going to be a good sour, but it's just not that sour. Some kind of fruit in the background, but not too strong. Could be a little more sour. Easy to drink, and would make a good summer beer.

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Photo of SAUbrewcrew
3.21/5  rDev -3.9%
look: 4 | smell: 3 | taste: 3.25 | feel: 3 | overall: 3.25

Not a bad tasting beer. Actually not a bad beer overall! I have just failed to find the “sour” aspect in this kosmic sour. There is almost a slight, very slight sour citrusy hint in the aftertaste of the beer. I think it’s a decent brew that’s very drinkable. I was just disappointed with this one and believe it was mislabeled as a “sour”.

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Photo of bcgoldtoe
1.89/5  rDev -43.4%
look: 3 | smell: 3.25 | taste: 1 | feel: 1.75 | overall: 1.75

Wow, Boston Beer.... You managed to make an ale taste like an IPA. That's a massive failure. The ONLY sour, and I mean ONLY... is the miniscule hint of a suggestion of citrus aftertaste. This does not meet the standard of a sour beer. Do not buy if you like sour, because you will be sorely disappointed.

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Photo of Chickenhawk9932
3.8/5  rDev +13.8%
look: 4 | smell: 4 | taste: 3.75 | feel: 4 | overall: 3.5

Pours a nice Amber with an off white head that dissipates quickly.

Smells of cherry, sour grape, and earthy funk, slight mustiness.

Tart cherry and sour grape with a slight musty earth bitterness. Finishes dry.

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Photo of HandMeAnother
2.36/5  rDev -29.3%
look: 3.75 | smell: 4 | taste: 1 | feel: 3.25 | overall: 2.25

Disappointed. I haven't had Sam Adams in while and was excited that they were venturing out more. This beer had so much potential but they definitely failed at bringing the sour. This could've gotten a higher grade had they not "mislabeled" the bottle. I know they don't have much experience with this style of beer but they had the means to research and provide a better outcome. Two thumbs down.

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Photo of Peach63
4/5  rDev +19.8%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4

Pours yellow with a 1/2 inch white head. Cloudy. Heavy carbonation. Nice lacing.

Aroma is sour, acetic.

Taste of sour apple, slight oak.

Medium bodied, mouth puckering, dry finish.

A decent sour beer, as expected from Sam Adams.

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Photo of Mark-Leggett
3.69/5  rDev +10.5%
look: 3.75 | smell: 3.5 | taste: 3.75 | feel: 3.75 | overall: 3.75

Poured from a bottle: Golden with a small head. Smells of fruit and slight funkiness. Tastes of fruit, malt and a slightly sour ending. This beer is a pretty easy drinker, mild not all that sour but just enough for flavor

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Photo of Suds
3.3/5  rDev -1.2%
look: 3 | smell: 3 | taste: 3.5 | feel: 3.5 | overall: 3.25

In the fall pack, from a purple aluminum can, this is a hazy dark straw colored beer. White head. The aroma is sort of quiet. A little fruit...apple and peach...maybe. The taste is a bit dry and fresh...some fruit and a bit of grain. Not much else. It doesn't really live up to the name. It is neither kosmic nor is it sour. Forgettable.

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Photo of jmdrpi
3.61/5  rDev +8.1%
look: 4.25 | smell: 3.75 | taste: 3.5 | feel: 3.5 | overall: 3.5

12 oz bottle

clear, orange dark golden color, white head that fades. aroma is peachy, fruity, tart. taste is similar, not overly sour. thinner bodied, average carbonation.

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Photo of SierraNevallagash
3.8/5  rDev +13.8%
look: 4.25 | smell: 4.25 | taste: 3.5 | feel: 3.75 | overall: 3.75

12oz bottle - no legible date - poured into a Stella Artois goblet at 48F.

Pours a slightly hazed, bright copper hue, topped with two fingers of creamy white head that quickly reduces to a thick cap, leaving just a touch of lacing behind.

Nose: Immediately more funky than I anticipated. Dusty, woody brett notes, old cedar, fermented cherries, grape, leather, wet straw, lemon zest, some warm, toasty malts, and a little pucker of acedic pediococcus. Surprisingly complex, but take and inviting.

Palate: I will immediately state that unfortunately, the flavour does not live up to the aroma. It starts off with a very frail, grainy backbone, almost akin to a pilsner. Some of the aromas do translate to the palate, but in an unusually dilute way. Like an essence. There's practically no tartness - neither from lactobacillus nor pediococcus. It does however retain some of the dusty dry brett character. There is still a hint of that aged, fermented cherry/dark fruit note, and a little touch of toastiness on the very back end. There is some light floral, pithy, and resinous hop character as well, also on the very back end - which ultimately paves the way for a fairly dry, quick, finish that accentuates the graininess, while ramping down on any hint of "wildness" that there was to be found.

Mouthfeel/Body: The beer is light-bodied, with a slight roundness from the malt, and a faint buttery feel. Effervescence is surprisingly weak and loose, even going as far as being slightly on the flat side. It is, however, relatively crisp, and could potentially be fairly refreshing on a hot summer day.

Overall: It's no surprise that Samuel Adams would play it this safe when venturing into the "wild ale" world. They dipped their toes, tested the waters, but ultimately kept this very toned down and a little too quiet. It's almost as if they took their Sam '76 and pitched a tiny bit of bacteria in it for a minute, and called it a day. It certainly has the aromatic traits of a wild ale, but the flavour just lacks that pucker, kick, and complexity that makes a wild ale wild. It's more like a blend of 15% wild ale, and 85% Sam lager. Nevertheless, it isn't bad by any means - certainly drinkable, and I respect the effort.

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Photo of DefenCorps
1.98/5  rDev -40.7%
look: 3 | smell: 1.75 | taste: 2.25 | feel: 1.75 | overall: 1.5

Canned, best by Feb 2020.

A mildly hazy copper with a dense, white head with good retention and lacing, this looks solid. The nose is vaguely grainy, tart and cereal-like. Fatty, mildly oxidized, mildly honey like, this is inoffensive but completely boring. The palate opens mildly tart and grainy with a faint cereal note, a mild sweetness and a little honey before everything disappears. Mildly lactic with a little yogurt and honey. Drying, mildly sweet and a little watery on the finish, this beer is light in body and moderately carbonated. Not bad, just boring.

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Photo of Tweezerjam
2.1/5  rDev -37.1%
look: 4 | smell: 1.5 | taste: 2 | feel: 3 | overall: 2

Meh. Not my sort of beer. I respect the hell out of the Boston brewing company but like a lot of their side-projects I feel like this is just a brewer having some fun. I’d do the same thing if I owned a brewery- experiment and try new things. I’m sure somebody loves this.

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Photo of yuenglingfan101
3.44/5  rDev +3%
look: 3.5 | smell: 3.25 | taste: 3.5 | feel: 3.5 | overall: 3.5

Rose colored beer with some head. Smells a little fruity. Failed to meet my expectations. Taste like a berry drink gone flat not sour or tart some apple taste but not much

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Photo of hophugger
3.04/5  rDev -9%
look: 3.5 | smell: 3.25 | taste: 2.75 | feel: 3 | overall: 3.25

Light rose hue ans minimal head. Aroma is berries and a very light barnyard funk, very light. Taste is a let down as the upfront tartness quickly leaves the palate and becomes very watery. Maybe something new that Boston Beer is trying but def needs some work. Watery finish with very little flavor and almost non-existent mouth feel. Probably rated a little higher than I should have because I really wanted it to be good!

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Photo of johnnnniee
3.52/5  rDev +5.4%
look: 3.75 | smell: 3.5 | taste: 3.5 | feel: 3.5 | overall: 3.5

From the mixed 12 pack from Market Basket.
Mostly clear deep yellow in color with a thin white head that dissipate quickly. Light earthy funk and a faint tartness with some bready malt underneath. Pretty tame for a sour, maybe its a gateway sour beer.

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Photo of zeff80
3.42/5  rDev +2.4%
look: 3.75 | smell: 3.5 | taste: 3.25 | feel: 3.5 | overall: 3.5

12oz bottle. Poured out a clear, golden orange color with a small, off-white head of foam. It smelled of berries, lemon and yeast. Tart taste with berry and a touch of green apple.

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Photo of lordofthewiens
3.28/5  rDev -1.8%
look: 3.75 | smell: 3.25 | taste: 3.25 | feel: 3.25 | overall: 3.25

Copper color. Small, quickly disappearing head.
Faint aroma of fruit and funk.
Taste follows the nose. Not very flavorful at all.
Not very funky, not very sour.

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Photo of SBJR
1.91/5  rDev -42.8%
look: 3 | smell: 2 | taste: 1.5 | feel: 3 | overall: 1.75

Definitely not one of the better sours I've had. Was disappointed. My local store doesn't have much in the way of sours & I haven't had one in a while, so gave this a whirl. I'd have been better off getting a six pack of Elysian Superfuzz for $4.75 than this for $11.

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Photo of BEERMILER12
3.53/5  rDev +5.7%
look: 4 | smell: 3.5 | taste: 3.5 | feel: 3.5 | overall: 3.5

A: Pours a copper color with 2 fingers of head that fades down to a thin cap that leaves decent lacing

S: Light sour and funk up front along with some light fruit and caramel notes

T: Follows the nose. Starts off with a little sour funk and fruitiness and then picks up some bready malt and caramel. Finishes with lingering funk and fruit

M: Medium bodied with moderate carbonation

O: A decent little sour from Samuel Adams. Not really all that complex, especially for a sour, but that’s to be expected here honestly. Pretty easy to drink. Not bad

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Photo of mooseisloose
2.38/5  rDev -28.7%
look: 3.5 | smell: 3 | taste: 1.75 | feel: 3.5 | overall: 2

Picked up as part of a twelver fall package. This with regular Sam, Sam 76 and Oktoberfest. Lets give it a whirl. Popping the top I get a fruity, bready wafer smell. Pours to a rose gold with a tan medium bubble head. Taste is a bit acidic up front with kind of tart middle and a wholesome mildly bitter finish. Hard to pinpoint as to keeping with the style. Needs more ABV. This is like a berry shandy. Refreshing but nothing really good stands out. This ain't a keeper.

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Photo of gueuzeonhigh
3.03/5  rDev -9.3%
look: 3 | smell: 3 | taste: 3 | feel: 3.25 | overall: 3

I like sour ales and similar so I grabbed a six of Kosmic Sour.
Pours OK, look is OK, taste is light with a hint of sour but nothing notable-- I did not taste anything that makes me remember this brew.
It's an OK beer-- and a great thirst quencher but a conversation libation it is not.
My beer opinion puts it as a light bodied ale with a hint of sour character that dissipates quickly yet leaves a clean finish.

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Photo of ChainGangGuy
2.5/5  rDev -25.1%
look: 2.5 | smell: 2.5 | taste: 2.5 | feel: 2.5 | overall: 2.5

12 ounce bottle - $1.99 at Total Wine & More in Kennesaw, Georgia.

Appearance: Minimally hazy, dull golden-amber body with an ultra thin, white head.

Smell: Middling wheat and lacquered potato bread slices, some muted citrus hints and a crumbling of spiced coffee cake.

Taste: Sweetish, slightly bready with a curious spiced cake bent to it and tinge of caramel. Touch of tea-like tannins lurking about. A light blurred blending of fruitiness, nothing particularly interesting there whatsoever. A tad bit sour, tart, though it's fairly tame and bland there as well. Flavors continue to thin, albeit a touch of spice enters the flavor as you approach the drab finish.

Mouthfeel: Medium-thin body. Medium carbonation.

Overall: A muddled and clumsy offering. Pass on it, folks. Even a middle-of-the-road sour thoroughly trounces this one.

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Kosmic Sour from Boston Beer Company (Samuel Adams)
Beer rating: 80 out of 100 with 68 ratings