Fundamental Theorem
Bottle Logic Brewing

Fundamental TheoremFundamental Theorem
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Stout - American Imperial
4.29 | pDev: 8.86%
Bottle Logic Brewing
California, United States
Retired (no longer brewed)
Fundamental TheoremFundamental Theorem
Notes: Fundamental Theorem began as a small reservation of the best tasting barrels from the third batch of Fundamental Observation. Over the last two years this same initial liquid has been guided through four successive sets of bourbon barrels, soaking in the bold bourbon spirit and pulling the charred caramel-vanilla essence from the oak as the liquid expanded and condensed throughout the seasons.⁣

At an otherworldly 20.59% ABV, this beer is not for everyone. It’s all bourbon, all barrel, and all elegantly aged and finished with a blend of velvety Madagascar and soft, floral Tahitian vanilla beans.
Reviews: 12 | Ratings: 48 | Log in to view all ratings and sort
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WickedBeer from Alabama

3.97/5  rDev -7.5%
look: 4.25 | smell: 3.5 | taste: 4.25 | feel: 3.75 | overall: 4

This has not mellowed one bit; boozy bourbon bomb. Loaded with notes of oak, dark fruit, and ethanol throughout. Vanilla slowly peaks out after some time, but even for me this one could drink smoother. That and it could use more body. Warms really nicely.

Aug 10, 2021
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eppie82 from Illinois

4.17/5  rDev -2.8%
look: 4.25 | smell: 4 | taste: 4.25 | feel: 4 | overall: 4.25

You better like boozy beers if you're drinking this. Boozy on the nose and in the flavor. The hints of vanilla that come out as it warms only serves little to tame some of the booze. Medium mouthfeel. The theme of this beer is boozy though. One of the guys in the share described it as 'bourbon with a shot of beer'.

May 28, 2020
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rodmanfor3 from Vermont

4.36/5  rDev +1.6%
look: 4.25 | smell: 4.5 | taste: 4.25 | feel: 4.25 | overall: 4.5

I liked the concept of this beer, but it was a slight miss. The finished product ended up being too boozy without enough of the lovable vanilla flavor that everyone crazes in the Fundamental lineup, thus creating an unbalanced beer.

Jan 27, 2020
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pants678 from California

3.4/5  rDev -20.7%
look: 4.25 | smell: 4.75 | taste: 2.75 | feel: 2 | overall: 3.5

Black, some light tan foam.

Sugary chocolate syrup and alcohol.

Chocolate liqueur more than anything. Perhaps needs time to settle but as is the bourbon is overwhelming. No coffee, no bitterness.

Particularly hot, in that way doesn't come off as a beer. I want to say thin, rather it's the heat that undercuts the beer.

Sep 01, 2019
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Knapp85 from Pennsylvania

4.25/5  rDev -0.9%
look: 4.25 | smell: 4.25 | taste: 4.25 | feel: 4.25 | overall: 4.25

Pours a rich black color with a rapid fading mocha head on top. The smell has a ton of boozy heat that stings the nose. There is brownie batter in the mix as well. The taste of the beer has a lot of bourbon flavors, lots of wood and vanilla going on here. The feel is thick and hot, it’s literally like drinking bourbon which is really impressive for it still being a beer. Overall, this is pretty intense. Happy to have had the chance to try it!

Aug 16, 2019
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GreesyFizeek from New York

4.5/5  rDev +4.9%
look: 4.25 | smell: 4.75 | taste: 4.5 | feel: 4 | overall: 4.5

This one pours a very dark black color, with a small head, and no lacing.

This smells pure pure and alive bourbon character, with char, vanilla, roast, gasoline, smoke, caramel, and oak.

Even though you could set the room on fire with this beer, it's still really, really tasty. The pure and unadulterated booziness inherent in the nose isn't as noticeable in the taste, as there's much more of a smoothness. It still tastes a touch prickly, and certainly herbal and bitter. There's also a lot of fudge and vanilla here, brownie batter, with heavy duty oak and searing bourbon. There's a touch of coffee creamer and bitter booze.

This is medium bodied - maybe it's a touch thin - with a lingering booziness on the back end of each sip. It's definitely more drinkable than it should be.

This is Fundamental Observation with the dial turned up to 11. It could have been a messy disaster, but it really did work.

Aug 04, 2019
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Vidblain from Minnesota

4.33/5  rDev +0.9%
look: 4.5 | smell: 4.5 | taste: 4.25 | feel: 4.25 | overall: 4.25

I've had a fair number of the Fundamental series now, and I was quite prepared to have socks knocked from my feet...

There's a tendency within the beer community, I think, to refuse to acknowledge that a beer just isn't ready to drink yet - but I'm going to say it. This beer is a hot, boozy, stick mess. It's tasty, don't get me wrong - but that booze seriously needs some time to mellow. I worry that, in that time, much of the vanilla and chocolate will disappear, which is a damned shame.

Good beer? Yes. Epic, hall of fame beer? I think not.

Jun 09, 2019
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Sabtos from Ohio

4.12/5  rDev -4%
look: 4 | smell: 4.5 | taste: 4 | feel: 3.5 | overall: 4.25

Just looking at it is imposing. You can SEE the punishment. It's a pupil burning black. The thin tan blanket quickly dies to nothing but a slick black surface with burning red edges.

And boom, right in your face is hot woody bourbon, not unlike sipping on the real spirit. However, it has a nice char and spice to it, with a complexity that doesn't seem cheap or gimmicky. While it's still somewhat thick like the regular version, and there's smoothing vanilla, it's got a stinging heat through and through, as the semi-dry finish enhances the brownie batter aroma that has managed to survive in this monstrous evolution.

I easily enjoy FO more than this, but this is a unique experience in its own right. If you like higher octane stuff, it doesn't get much better than this.

May 23, 2019
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emyers from Illinois

4.32/5  rDev +0.7%
look: 4.25 | smell: 4.75 | taste: 4 | feel: 4.25 | overall: 4.5

500 mL bottle poured into a snifter.

Pours black with a fairly aggressively carbonated half-inch head dissipating quickly into a thin dark brown lacing.

Nose: Incredibly decadent. Rich layers of vanilla and bourbon along with a strong dark fruit presence. A bit boozy at the end.

Taste: Boozy bourbon up front followed by a ton of vanilla. Quite a bit of heat in the finish - WAY more bourbon forward than fundamental observation. This could definitely use a good amount of time in the bottle to calm down, but has incredible potential.

Feel: Full-bodied, pretty high carbonation for the style.

Apr 20, 2019
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gibgink from Missouri

3.99/5  rDev -7%
look: 4.25 | smell: 4 | taste: 4 | feel: 3.75 | overall: 4

Sampled on 4-6-19. Pours a very dark brown/black with minimal head. Not a lot going on in the smell department, maybe a hint of vanilla and booze. Initial sip and the booze hit my throat really hard. Was not expected Black Tuesday. Following tastes were better, as my body must've been ready for the high alcohol and it wasn't prevalent. Faint vanilla on the back end, but other than that, not really impressed. I'd take the regular any time.

Apr 08, 2019
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Drift from California

4.48/5  rDev +4.4%
look: 4.75 | smell: 4.75 | taste: 4.25 | feel: 4.5 | overall: 4.5

Very boozy. I think even more so as it warms up. Def get multiple barrels out of the taste. I def rec. letting it age a little and going back at it again down the line.

Mar 30, 2019
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Radcpa from Washington

4.73/5  rDev +10.3%
look: 5 | smell: 4.5 | taste: 5 | feel: 4.5 | overall: 4.5

Dark appearance with slight tan head that dissipates slowly. Aroma is a pleasant caramel. Taste is also a very pleasant caramel and vanilla that is well worth trying.

Mar 21, 2019
Fundamental Theorem from Bottle Logic Brewing
Beer rating: 92 out of 100 with 48 ratings