Key Lime Tau (2π)
Crooked Stave Artisan Beer Project


- From:
- Crooked Stave Artisan Beer Project
- Colorado, United States
- Style:
- Wild Ale
Ranked #615 - ABV:
- 6.28%
- Score:
- 90
Ranked #11,261 - Avg:
- 4.05 | pDev: 9.14%
- Ratings:
- | reviews: 36
- Status:
- Active
- Rated:
- Feb 20, 2025
- Added:
- Jul 10, 2015
- Wants:
- 4
- Gots:
- 11
Key Lime Tau (2π) was brewed in collaboration with Hawkshead Brewery (UK) as part of the Trans-Atlantic Rainbow Project, a series that challenges brewers to come together and brew a beer inspired by a color. In its third year, the 2015 project involved seven UK breweries, each paired with a different American brewery and randomly assigned a color.
Key Lime Tau (7.0% ABV), brewed to embody the color green, is a Mixed Culture Fermentation Ale aged in Oak with Lactose, Fresh Lime Peel and Fresh Lemongrass.
Key Lime Tau (7.0% ABV), brewed to embody the color green, is a Mixed Culture Fermentation Ale aged in Oak with Lactose, Fresh Lime Peel and Fresh Lemongrass.
Recent ratings and reviews. | Log in to view more ratings + sorting options.
Ratings by fmccormi:
Reviewed by fmccormi from California
4.3/5 rDev +6.2%
look: 4 | smell: 4 | taste: 4.5 | feel: 4.5 | overall: 4.25
4.3/5 rDev +6.2%
look: 4 | smell: 4 | taste: 4.5 | feel: 4.5 | overall: 4.25
Straight pour from a 375ml pry-off bottle to an oversized teku-type glass; this is from a July 2015 batch, which would put it at somewhere between three to four months old. It’s been chilled for over 24 hours, so it’s had time to settle. Not sure what condition this will be in, but I’ve been looking forward to it for a while now.
Appearance (4.0): About three fingers of ecru-colored foam rise off of the pour, capping a perfectly hazy, glowing orange body. The head dies down at a somewhat quick pace, but given the mixed fermentation it’s not too fast. A smattering of thin, foamy splotches all around the glass make up the lacing and retention. Overall, not bad—a gorgeous body, a nice but relatively short-lived head, and sparse but pretty lacing.
Smell (4.0): Lime peel, a bit of sweet cream (almost like a dollop of condensed milk), sweet lemongrass, bready, biscuity malt, and a mixture of tart funk and subtle musty note. The lemongrass in particular comes out more as it warms.
Taste (4.5): Some slightly sweetened limeade mixes with sweet lemongrass, which adds a grassy, herbal undertone at the same time. A rather tart, almost astringent lime peel note undercuts the whole palate and pops up much more assertively in the finish. All this time, there’s also a smooth, sugar cookie or pastry dough-like sweetness that represents the malt body. In this instance, that’s also where the lactose is hiding, making the malt smoother, fuller, and rounder. The brettanomyces and oak vessel funk weave themselves into the beer’s different components exceedingly cleanly and smoothly—the brett funk shows itself with a very slightly medicinal edge that hides next to the lime peel, and a mellow oaky note hangs out underneath the pastry-like malt. This is fascinating.
Mouthfeel (4.5): The body is smooth and just under medium weight, with a soft carbonation that foams up with a nice tingle on its way down. The brett and the lime peel both work against the lactose to dry it out on the palate, making for an overall very smooth, but also tart drink. This beer’s got a ton of character.
Overall (4.25): Boy oh boy, this is an odd mix in some ways, but it really works for me because of how much I like its separate ingredients. On top of that, the lime and lemongrass work simultaneously with and against the lactose and malt body, and the brett and oak offer similar counterpoints while adding depth to its other components. This is a deceptively well thought-out beer. Definitely recommended for open-minded fans of mixed culture fermentation. Crooked Stave really knows what they’re doing, eh?
Nov 04, 2015Appearance (4.0): About three fingers of ecru-colored foam rise off of the pour, capping a perfectly hazy, glowing orange body. The head dies down at a somewhat quick pace, but given the mixed fermentation it’s not too fast. A smattering of thin, foamy splotches all around the glass make up the lacing and retention. Overall, not bad—a gorgeous body, a nice but relatively short-lived head, and sparse but pretty lacing.
Smell (4.0): Lime peel, a bit of sweet cream (almost like a dollop of condensed milk), sweet lemongrass, bready, biscuity malt, and a mixture of tart funk and subtle musty note. The lemongrass in particular comes out more as it warms.
Taste (4.5): Some slightly sweetened limeade mixes with sweet lemongrass, which adds a grassy, herbal undertone at the same time. A rather tart, almost astringent lime peel note undercuts the whole palate and pops up much more assertively in the finish. All this time, there’s also a smooth, sugar cookie or pastry dough-like sweetness that represents the malt body. In this instance, that’s also where the lactose is hiding, making the malt smoother, fuller, and rounder. The brettanomyces and oak vessel funk weave themselves into the beer’s different components exceedingly cleanly and smoothly—the brett funk shows itself with a very slightly medicinal edge that hides next to the lime peel, and a mellow oaky note hangs out underneath the pastry-like malt. This is fascinating.
Mouthfeel (4.5): The body is smooth and just under medium weight, with a soft carbonation that foams up with a nice tingle on its way down. The brett and the lime peel both work against the lactose to dry it out on the palate, making for an overall very smooth, but also tart drink. This beer’s got a ton of character.
Overall (4.25): Boy oh boy, this is an odd mix in some ways, but it really works for me because of how much I like its separate ingredients. On top of that, the lime and lemongrass work simultaneously with and against the lactose and malt body, and the brett and oak offer similar counterpoints while adding depth to its other components. This is a deceptively well thought-out beer. Definitely recommended for open-minded fans of mixed culture fermentation. Crooked Stave really knows what they’re doing, eh?
More User Ratings:
Reviewed by zeff80 from Missouri
4.06/5 rDev +0.2%
look: 4 | smell: 4.25 | taste: 4 | feel: 4 | overall: 4
4.06/5 rDev +0.2%
look: 4 | smell: 4.25 | taste: 4 | feel: 4 | overall: 4
On draft at PapPo's. Poured a slightly cloudy, golden orange color with a small, khaki-colored head of foam. It smelled of key lime, funkiness and caramel. Sweet lime with a tart bite, funkiness and some sweet caramel.
Feb 20, 2025Reviewed by nickb2000 from New Hampshire
3.57/5 rDev -11.9%
look: 3 | smell: 3.5 | taste: 3.75 | feel: 3.5 | overall: 3.5
3.57/5 rDev -11.9%
look: 3 | smell: 3.5 | taste: 3.75 | feel: 3.5 | overall: 3.5
Imperial Pint
Look: Slightly hazy rust-brown color, pouring near zero head which retained as a slight ring with minimal lacing
Smell: Musty basement yeast, citric acid, lime zest, hint grass and milk funk
Taste: Lightly tart with yeast funk. Leads to Lemongrass, lime zest, oak tannins. Finish has a more oak, hint of malt, hint zest.
Feel: Light-med body, gentle carbonation, semi-crisp finish
Overall: Its okay, good oak and lime representation.
Jan 22, 2023Look: Slightly hazy rust-brown color, pouring near zero head which retained as a slight ring with minimal lacing
Smell: Musty basement yeast, citric acid, lime zest, hint grass and milk funk
Taste: Lightly tart with yeast funk. Leads to Lemongrass, lime zest, oak tannins. Finish has a more oak, hint of malt, hint zest.
Feel: Light-med body, gentle carbonation, semi-crisp finish
Overall: Its okay, good oak and lime representation.
Reviewed by Limazulu from Idaho
3.58/5 rDev -11.6%
look: 3.75 | smell: 3.75 | taste: 3.5 | feel: 3.5 | overall: 3.5
3.58/5 rDev -11.6%
look: 3.75 | smell: 3.75 | taste: 3.5 | feel: 3.5 | overall: 3.5
A-burnt orange, modest head that dissipated quickly
S-grassy and funky. Must be from the yeast
T-acidic tart/sweet. oaky
M-Light (+) body, below average carbonation.
O-wierd. My palete would start to say "this is pretty good", then all of sudden I would catch a wave of vinegar or something.
Aug 23, 2020S-grassy and funky. Must be from the yeast
T-acidic tart/sweet. oaky
M-Light (+) body, below average carbonation.
O-wierd. My palete would start to say "this is pretty good", then all of sudden I would catch a wave of vinegar or something.
Reviewed by Franziskaner from Missouri
3.91/5 rDev -3.5%
look: 3.75 | smell: 4 | taste: 3.75 | feel: 4.25 | overall: 4
3.91/5 rDev -3.5%
look: 3.75 | smell: 4 | taste: 3.75 | feel: 4.25 | overall: 4
Copper colored with a trace of off white around a quarter of the rim. The aroma is of lemongrass and lime. I’m tasting lemongrass and a touch of lime. The mouth is moderately carbonated, but has a nice cooling sensation from the lemongrass.
Jul 29, 2020Reviewed by StoutElk_92 from Massachusetts
4.65/5 rDev +14.8%
look: 4.5 | smell: 4.5 | taste: 4.75 | feel: 4.5 | overall: 4.75
4.65/5 rDev +14.8%
look: 4.5 | smell: 4.5 | taste: 4.75 | feel: 4.5 | overall: 4.75
375ml bottle
Pours slightly hazy amber orange copper with a creamy off-white foam head. Smells zesty, lively and invigorating with fresh lemongrass, key lime peel, lemon, some malt, and creamy vanilla-like lactose. Tastes like key lime pie, fresh lemongrass, tart lemon, lime peel, creamy lactose, sweet spice, oak barrel, bready caramelized malts, with floral earthy grassy hops. Feels medium bodied, creamy with smooth moderate carbonation. Overall a real nice key lime pie inspired wild ale.
Apr 14, 2020Pours slightly hazy amber orange copper with a creamy off-white foam head. Smells zesty, lively and invigorating with fresh lemongrass, key lime peel, lemon, some malt, and creamy vanilla-like lactose. Tastes like key lime pie, fresh lemongrass, tart lemon, lime peel, creamy lactose, sweet spice, oak barrel, bready caramelized malts, with floral earthy grassy hops. Feels medium bodied, creamy with smooth moderate carbonation. Overall a real nice key lime pie inspired wild ale.
Reviewed by Suds from Missouri
3.99/5 rDev -1.5%
look: 3.75 | smell: 4 | taste: 4 | feel: 4 | overall: 4
3.99/5 rDev -1.5%
look: 3.75 | smell: 4 | taste: 4 | feel: 4 | overall: 4
Lightly hazy, golden and dry...the head is thick and white with intricate lace. Flavorful, tart....lime tang...wonderful. There is a bit of pale malt underneath. The finish is dry and acidic. Medium body and enjoyable.
Mar 11, 2019Rated by Sewercap from New York
1.74/5 rDev -57%
look: 4 | smell: 3 | taste: 1 | feel: 1.25 | overall: 1.25
1.74/5 rDev -57%
look: 4 | smell: 3 | taste: 1 | feel: 1.25 | overall: 1.25
Nasty, nasty beer. Avoid at all costs. Disgusting.
Jan 27, 2019Reviewed by Roguer from Connecticut
3.85/5 rDev -4.9%
look: 3.75 | smell: 3.75 | taste: 4 | feel: 3.75 | overall: 3.75
3.85/5 rDev -4.9%
look: 3.75 | smell: 3.75 | taste: 4 | feel: 3.75 | overall: 3.75
Translucent dark orange, brownish ale, topped with a decent head - about 1 finger from a turbulent pour.
Musty oak, tannin, vinegar, and lime come together in a tart, funky, slightly muddled package.
Flavor follows. It's an odd (but pleasant) mix of sweet, sour, and funky. Brown sugar, key limes, honey, oak, tannin, and mild vinegar. Only mildly sour.
Smooth and oily on the palate.
Nov 18, 2018Musty oak, tannin, vinegar, and lime come together in a tart, funky, slightly muddled package.
Flavor follows. It's an odd (but pleasant) mix of sweet, sour, and funky. Brown sugar, key limes, honey, oak, tannin, and mild vinegar. Only mildly sour.
Smooth and oily on the palate.
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