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Chaos Theory - BrewDog

Not Rated.
Chaos TheoryChaos Theory

Displayed for educational use only; do not reuse.
very good

104 Ratings
no score

(send 'em beer!)
Ratings: 104
Reviews: 75
rAvg: 3.76
pDev: 10.64%
Wants: 5
Gots: 4 | FT: 0
Brewed by:
BrewDog visit their website
United Kingdom (Scotland)

Style | ABV
English India Pale Ale (IPA) |  7.10% ABV

Availability: Rotating

Notes/Commercial Description:
No notes at this time.

(Beer added by: Suds on 05-14-2009)
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Ratings: 104 | Reviews: 75 | Display Reviews Only:
Photo of Sammy

Ontario (Canada)

3.88/5  rDev +3.2%
look: 3.5 | smell: 3.5 | taste: 4 | feel: 4 | overall: 4

Amber ale, or sort of IPA. Its in the style, its higher than average IPA, and so its above average bitterness for sure than your local British empire beer. Pours medium yellow, with some off-white head. Some citrus taste. Very drinkable, a bit of ageing helped.Above average mouthfeel.

Serving type: bottle

01-04-2010 00:44:27 | More by Sammy
Photo of ZimZamZoom

West Virginia

3.55/5  rDev -5.6%
look: 3.5 | smell: 3.5 | taste: 3.5 | feel: 3 | overall: 4

Poured into a pint glass from a 22.4 oz. bottle. Slightly cloudy amber color, nice thick tan head with abundant lacing.

A nice malty caramel aroma, some piney hops in the background. Also light citrus character with a touch of spice. Aroma is malt forward, not unexpectedly. Taste also is earthy malt first, some caramel, hop flavor is minimal, mostly spiced citrus in nature. Big bitterness in the end though, as the hop bite hits hard and lingers for quite a bit.

This beer is a touch thin, good carbonation and certainly a nice drinkable English IPA.

Serving type: bottle

12-20-2009 18:06:41 | More by ZimZamZoom
Photo of Wasatch


3.83/5  rDev +1.9%
look: 3.5 | smell: 3.5 | taste: 4 | feel: 3.5 | overall: 4

22.4oz Bomber
Batch: 9
Best Before: 08/16/10

Poured into a chalice a nice golden orange color, some carbonation, nice little fizzy off-white head, with some sticky lacing left behind. The nose is malty, very slight hop, some citrus. The taste is malty, some hop notes, sweet, bitter, some citrus. Medium body. Drinkable, a tasty brew, but was expecting more.

Serving type: bottle

12-13-2009 20:01:58 | More by Wasatch
Photo of cvstrickland

North Carolina

2.88/5  rDev -23.4%
look: 3.5 | smell: 3.5 | taste: 3 | feel: 2.5 | overall: 2

The slope-shouldered bomber bottle pours an orange-tinted golden brew with a short cap of grainy pale ecru foam atop that fizzes out faster than it took me to type this sentence. Really. The skimmy ringlet that outlines the naked surface of Chaos Theory deposits token drips and drabs of leftover foam onto the sides of a shaker pint glass, resulting in minimal lacing.

The aroma is musky mix of fruity apple and melon-like notes and a twist of green herbal spice.

The taste is mildly fruity and sweetly malty with a little dose of unflavored bitterness for balance. Alcohol is thinly masked and chemically unpleasant, contributing to the fruitiness a bit before scouring my palate clean. Belly warming is almost immediate and palpable.

The drink is medium in body and undercarbonated, leaving me with little desire to even finish the first pour from the bottle. Avoid.

Serving type: bottle

12-09-2009 21:45:55 | More by cvstrickland
Photo of BlackHaddock

United Kingdom (England)

3.85/5  rDev +2.4%
look: 3 | smell: 3.5 | taste: 4 | feel: 4 | overall: 4

Third BrewDog beer of the evening, poured into my lovely 'Judas' glass, almost a full year of life left according to the label.

Murky dull, deep, old gold/muddy terracotta coloured body with an off-white head on top.

Smells of hops and more hops, maybe a hint of malted barley in there too.

Good hoppy taste, not over the top, just heavy on the hops. The ABV is feelable and sits well within the taste and structure of the beer.

Could do without some of the condescending blurb on the label, but the beer is very good.

Serving type: bottle

11-27-2009 18:45:09 | More by BlackHaddock
Photo of WesWes

New York

3.8/5  rDev +1.1%
look: 4 | smell: 3.5 | taste: 4 | feel: 4 | overall: 3.5

The beer pours a nice amber color with a thick frothy offwhite head that slowly fades to lacing. The aroma is decent. It has a complex malt aroma of pale, Carapils, and bisquit malts along with a mild hop nose that balances the aroma nicely. The taste is good. It has a smooth, malt centric flavor with a solid hop taste in the finish. It's got a fresh hop taste, but nothing over the top like most American IPA's. Instead, the malts provide excellent character and appropriate balance. The mouthfeel is fine. It is a full bodied beer with adequate carbonation. This is a good drinking beer. It's nothing exceptional, but it's full of flavor and easy drinking even at 7.1%.

Serving type: bottle

11-23-2009 23:04:15 | More by WesWes
Photo of atsprings

North Carolina

4.13/5  rDev +9.8%
look: 4 | smell: 3.5 | taste: 4.5 | feel: 4 | overall: 4

22.4oz bottle into a Duvel tulip at Flying Saucer pours a crisp dark orange with a decent khaki head that lasts and leaves spotty lacing on the glass. Aroma is a decent balance of sweet malts and funky hops. The taste is funky bitter hops up front with a nice malt backbone, very interesting and unique, quite tasty. The beer is medium bodied with a slight alcohol presence. This is a very enjoyable, unique beer.

Serving type: bottle

11-20-2009 00:36:14 | More by atsprings
Photo of Travlr

District of Columbia

3.8/5  rDev +1.1%
look: 4 | smell: 3 | taste: 4 | feel: 4 | overall: 4

Appearance is deep amber orange with a large thick off white head and excellent lacing.
Smell is very subtle, just a bit of citrus and some floral notes.
Taste is rich malt, grapefruit, and a background of black pepper. Dry, with a moderately bitter finish.
Great body, very nice IPA, not over the top, complex flavor.

Serving type: bottle

11-17-2009 00:30:59 | More by Travlr
Photo of Offa


4.1/5  rDev +9%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4.5

This is an excellet, solid IPA, with firm, lightly complex flavour, and good balance.

Copper-amber, faintly hazy, it has a medium pale beige head that slowly shrinks to thin, frothy top and leaving a little nice, frothy lace.

Aroma is subdued but still characterful, with firm malty grain, fruity and jammy with citrusy hops leaning to the orange and marmalade. There is a hint of pine sap and herbal leafiness as well.

Taste is firmly malty, raisiny and lightly but clearly toasty and earthy with citrusy hops (bitter, burnt orange, orange zest, hint of grapefruit), hints of resin and herbal, leafy spiciness. Overall, bitterness and sweetness are balanced, with bitterness just taking over the finish slightly, with a briefly spicey bitter finish, before settling back into a lingering, balanced aftertaste with even bitterness and sweetness. Elements are integrated well and all hold up nicely. It has a light fullness with a hint of oiliness without relaly bieng oily.

Serving type: bottle

11-09-2009 19:29:14 | More by Offa
Photo of cypressbob

United Kingdom (Northern Ireland)

4.22/5  rDev +12.2%
look: 4 | smell: 4 | taste: 4.5 | feel: 4 | overall: 4

330ml bottle, served chilled (in the same glass I've been using for all my beer notes over the last week or so, I will dip into the collection and change things a little)

It pours with a rich, slightly hazy amber body. Whispy off white head soon settling to a modest half finger.

Not a huge nose, English hops beefed up with an almost pilsner-esque Sazz aroma. A touch medicinal but only very slight, some fruity notes too but nothing overpowering

On the palette. huge biscuity dry lingering hops. A whack of quinine and grapefruit acidic notes, followed by a lasting pleasing dryness on the finish. Backbone of pale malt with a touch of alcohol too. Not big on aromas but hugely hopped bitterness on the palette. Some esters lingering around the mouth punctuated by bills, ballsy bitterness

Serving type: bottle

11-03-2009 20:40:56 | More by cypressbob
Photo of NittanyBeerFan


3.88/5  rDev +3.2%
look: 3.5 | smell: 3.5 | taste: 4 | feel: 4 | overall: 4

Got this one in a trade with stoutfiend27...Thanks Stephen!

A: No head to speak of, but the color is a beautiful crisp copper...any darker and this would look like a DIPA. Despite the lack of head, there is a surprisingly full laced pattern.

S: Sweet smell of caramel malts come through in a big way. There are also some earthy and citrusy hops with a decent amount of hop bitterness that pushes the initial caramel malt character away.

T: Sticky and bitter citrusy hops with some lighter earthy notes take control of the palate early. There is a lot of alcohol in this for an IPA, but none of it is noticeable in any way. The malt backbone is almost DIPA-like in the depth of its caramel flavor.

M/D: Surprisingly smooth, as the carbonation is low (expected after the lack of head). The feel is sticky and resinous, as the beer stays with you after the swallow. The hop character was good and fully. Very enjoyable overall.

Serving type: bottle

10-31-2009 19:47:16 | More by NittanyBeerFan
Photo of Gmann

New York

3.5/5  rDev -6.9%
look: 3.5 | smell: 3.5 | taste: 3.5 | feel: 3.5 | overall: 3.5

Pours a brown color with honey hightlights, a rather small and whispy head that dissipates into a light ring. Aroma is of toasted malt, fruity, caramel, and a light floral hop. The taste starts off with a bready malt, has a weird sour spiciness, honey, mineral water and some herbal notes. The hop flavor has some tropical fruit notes, piney with a touch of resiny bitterness. The brew has a moderate body with semi-soft carbonation; starts off sweet but finishes bitter. A malty AIPA for sure, though not overly so. Seems like a dirty AIPA since there are quite a few flavors from the malt. The hop profile is nothing special. A unique take on an AIPA.

Serving type: bottle

10-31-2009 02:10:06 | More by Gmann
Photo of fullsweep

United Kingdom (England)

2.85/5  rDev -24.2%
look: 4.5 | smell: 4 | taste: 2.5 | feel: 3 | overall: 2

330 mL brown bottle poured into a pint glass.

A: beautiful, clear, brown/amber with hints of orange in the color. Very thin/no head but a bit of lacing.

S: fruity, hoppy, with melon, pumpkin, rutabaga/swede and some sour/ripe hints in the fruit aromas.

T: again fruity but overpowered by a strong hoppy bitterness--too bitter for my tastes.

M: sticky/syrupy with light carbonation

D: not a bad beer, but overall not one I'll drink again due to the high bitterness/hopped factor.

Serving type: bottle

10-16-2009 19:32:50 | More by fullsweep
Photo of vrazionale


4.1/5  rDev +9%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4.5

22.4 oz bottle at refrigerator temperature poured into a snifter. Bottle reads: "Batch 012, Best Before 08/16/10."

A - Burnt siena brown body with a foamy cream-colored head that backs down to splotches along the edges.

S - Floral, fruity, and spicy. The fruit character is stone fruit all the way - peach and apricot. The sweet malt profile reminds me of layered, complex heather honey. Quaffable and unique - altogether a very accessible and enjoyable nose.

T - A touch of bitterness from the hops, but by and large the hop character manifests itself as fruity and floral. I find the flavor profile to be very balanced and well-layered - everything just sits well together. Alongside the mildly bitter finish, I am again reminded of the richness and complexity of a darker heather honey.

M - The carbonation in this brew is pretty spot-on. Just enough to lift the heaviness of the malt character off of the palate, leaving behind the more subtle and understated flavor notes.

D - I thoroughly enjoy this brew. It's a refreshing change of pace from well-hopped and well-malted beers that have no appreciation for subtlety. On a relatively unrelated note, I have no idea why this brew is called "Chaos Theory." The pseudo-didactic description of chaos theory on the bottle does little to illuminate why the folks at BrewDog have named this beer Chaos Theory. At any rate, do yourself a favor and find this brew, along with some Cabot Clothbound Cheddar, some good butter, and a freshly-baked loaf of white bread, and make a grilled cheese to eat alongside this delicious brew. I'm fairly certain that will be a meal that you will not regret.

Serving type: bottle

10-12-2009 02:25:10 | More by vrazionale
Photo of DerBayer


3.53/5  rDev -6.1%
look: 5 | smell: 3.5 | taste: 3.5 | feel: 3 | overall: 3.5

Appearance of this one is extremely enticing - it s dark amber with a ruby tinge.

The smell is strongly of hops and lots thereof - very bitter. The taste is HOPS HOPS HOPS and lots thereof with little balancing malt sweetness

Mouthfel is a bit too dry for my liking but carbonation is adequate

Drinkability is OK overall

Serving type: bottle

10-11-2009 15:03:02 | More by DerBayer
Photo of thepeter

United Kingdom (England)

4.15/5  rDev +10.4%
look: 4 | smell: 4.5 | taste: 4 | feel: 4.5 | overall: 4

A - Deep orange golden in color. Nice head but turns to film fairly quickly, however left some fantastic lacing.

S - Fruity, grapefruit and tropical fruits, sappy pine needles, honey and floral notes.

T - Very similar to the smell. The fruits all hit you at the beginning with a nice clean bit of pine hops. The hop flavor escalates to a pleasantly bitter and flowery grapefruit rind all the way to the aftertaste.

M&D - Very smooth and easy to drink. The carbonation is Excellent for a bottled beer. More full bodied that many IPA's but not heavy by any means. I can (and will) drink a couple of these. My favorite Brewdog IPA.

Serving type: bottle

10-04-2009 10:14:34 | More by thepeter
Photo of crowncapcollect

United Kingdom (England)

4.28/5  rDev +13.8%
look: 4 | smell: 4 | taste: 4.5 | feel: 4.5 | overall: 4

330ml bottle into straight glass

Orange butterscotch colour. Nice head, but fades quickly. Strong hoppy American craft IPA taste, but not over-carbonated. Very tasty. The hoppy aroma reminds me of marijuana (again). Another great BrewDog IPA, and better than Hardcore in my opinion, this isn't sweet, and the alcohol just doesn't seem to be there, yet at 7.1% it clearly is. Nice one.

Serving type: bottle

09-08-2009 20:58:37 | More by crowncapcollect
Photo of mdagnew

United Kingdom (Northern Ireland)

3.78/5  rDev +0.5%
look: 4 | smell: 4 | taste: 3.5 | feel: 4 | overall: 4

330ml bottle bought from GapWines, Belfast..

Poured a nice bright clear coppery orange colour. Creamy head poured small but quite thick then faded to light covering with thick edging. Barely any carbonation... patchy lacing...

Aroma - Strong juicy fruits (oranges, apricots, pinepples, pears) mixed with a good pine hop note, lots of resiny sap, quite rubbery, cut wet grass, caramel and biscuit malts, herbal and light medicinal notes, faint alcohol whiff, hint of iron...

Taste - Overripe (tropical ?) fruits (pineapples, grapefruit, apricots, light melon), slightly harsh pine and citric hop bitterness, metallic notes, honey and caramel sweetness, light biscuity malts, peppery, some breadiness, quite floral...

M&D - Fairly smooth with a slight syrupy note then a little sharpness... light / medium bodied... pretty quaffable for 7.1%

Overall - A pretty decent IPA although there are one or two off flavours... worth a try..

Serving type: bottle

09-04-2009 07:17:35 | More by mdagnew
Photo of Bung


4/5  rDev +6.4%
look: 4 | smell: 3.5 | taste: 4 | feel: 4 | overall: 4.5

Fairly bright orange pour. Limited white head, disappears quickly. Aroma not overpowering with hops, some malt, must and citrus/pear. Malt and citrus fruit is present with nice balance to the piney hops. A little smokeyness to the bitter finish. Does not linger too much either. Nothing overpowering and quite drinkable, yet not outstanding in any way. The suble burnt/smoke is a nice quality. Worth trying.

Serving type: bottle

09-02-2009 03:08:42 | More by Bung
Photo of oberon

North Carolina

3.68/5  rDev -2.1%
look: 4 | smell: 3.5 | taste: 3.5 | feel: 4 | overall: 4

My first stab at the BrewDog line of beers.Poured into a imperial nonic a clear bronze with a fluffy two finger white head that settled into a soapy-like mass.Big English malt and hop aromas,sweet biscuit intertwined with leafy/herbal hop notes with a tinge of iron.The flavors to me are dominated by English malt up front,lightly sweet and biscuity with that light iron/metallic presence,the hops come late with a herbal,"green" smack.If there was such a thing as a IEPA this would be it,pretty good.

Serving type: bottle

08-30-2009 01:48:28 | More by oberon
Photo of wl0307

United Kingdom (England)

4/5  rDev +6.4%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4

Coming in a slim 330ml brown bottle, BB 17/10/10, served lightly chilled in a straight pint glass.

A: pours a much darker hue than both Punk and Hardcore IPA - dark reddish amber in colour, coming with perfect clarity, mild carbonation and a thin layer of off-white foamy head.
S: like Hardcore IPA, the aroma bursts with complex tropical fruits - green guava, sweet pineapples, star-fruits, passion-fruits, plus pink grapefruits, rendered by both hops and fruit esters, while a close sniff reveals the presence of biscuity malts and nectar-ish sourness. Refreshing and remarkably juicy-fruity, without any trace of alc. actually, while the maltiness seems to be much milder on the balance
T: the interesting foretaste of tropical fruits, grapefruity hops and nectar is ever so juicy, then gradually hop bitterness sets in, leading to a long and semi-spicy chewy finish that is pretty high on alpha acid but relatively low in terms of hop flavour. It's also in the aftertaste that the sound toffee-ish maltiness makes a belated presence, helping to reach a balance with the chewy mouthfeel.
M&D: impressively bottled, the carbonation is only lively where it's needed, against a medium body and pleasantly light (not as imposing or heavy as Hardcore IPA) flavour profile. I've had Punk IPA on cask which is absolutely sublime, while I'd tend to imagine this one on cask can match Punk's performance or fare even better, due to the understated yet firm presence of the malt elements. At 7.1%abv., I simply fail to notice the alc. content - a vivid witness to the craftsmanship! Highly enjoyable.

Serving type: bottle

08-23-2009 19:11:36 | More by wl0307
Photo of MisterClean


3.9/5  rDev +3.7%
look: 4 | smell: 4 | taste: 4 | feel: 3 | overall: 4

Shared with a buddy at belmont station.

A - Poured copper gold with a 2 fingered off white head. Dissipated moderately slow and left nice lacing.

S - Honey, caramel, light bittering hops, and breadiness.

T - Honey, caramel, bittering hops, bread, and light nectar.

M - Moderate-bodied with an off-kilter balance. Hops and malts did not mesh well together. Lightly dry, but smooth.

D - An interesting beer. An American beer brewed by brits. Would be wlling to try again, and alcohol well-hidden.

Serving type: bottle

07-30-2009 03:50:46 | More by MisterClean
Photo of PartyBear

United Kingdom (England)

3.9/5  rDev +3.7%
look: 3 | smell: 4 | taste: 4 | feel: 3.5 | overall: 4

A - A cloudy light brown in colour, with a small but thick head, that showed good retention throughout the pint.

S - Noticeable hops, with some very fruity notes.

T - There is a strong fruity base to this IPA, a slight orange tang, with what tastes like melon or grapefruit. A strong bitter aftertaste of hops, that is long lasting. The is no real sign of the whacking great alcohol content in the taste.

M - Quite thin in the palette, with a mildly watery body.

D - A nice pint overall. Doesn't show signs of the high ABV, so be careful when knocking this back, as it is very easy going when drinking. I'm a big fan of IPAs, and this is the first American style one I have had, and I will definitely be seeking out more beers in this style.

Serving type: on-tap

07-25-2009 16:13:55 | More by PartyBear
Photo of DoreenAndDave


4/5  rDev +6.4%
look: 4 | smell: 4 | taste: 4 | feel: 4 | overall: 4

A very nice, powerful IPA. Sturdy, almost heavy, but not in a bad way. This is a pretty substantial beer. Big hops, nicely bitter, with hints of maybe vanilla or something. There's some nice depth here. Overall, very good, but not quite great. Definitely would have again if the opportunity arose.

Serving type: bottle

06-15-2009 20:36:29 | More by DoreenAndDave
Photo of Brad007


3.83/5  rDev +1.9%
look: 3.5 | smell: 3.5 | taste: 4 | feel: 3.5 | overall: 4

Pours a medium brown color with a nice head that fades to leave lacing in my glass.

Aroma is full of sweet malt and floral hops that are nearly hidden in the nose.

Taste is full of light, floral hop bitterness and sweet malt underneath. Bitterness isn't too much nor too little.

Mouthfeel is full of lingering hop bitterness and malt like a typical IPA. Feels British in character.

Let's see, easy to drink and feels like a British IPA that is a bit stronger than usual in flavor. American hops and British malts more like it. Something like that. I'm obviously lacking in geography. Regardless, try it. It's not their best effort though.

Serving type: bottle

05-22-2009 23:18:07 | More by Brad007
Chaos Theory from BrewDog
85 out of 100 based on 104 ratings.