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What is the strongest percent a beer can be?

4 min read

At an astonishing 75% Alcohol By Volume (ABV), the current record holder for the world's strongest beer challenges conventional brewing and raises the question: what is the strongest percent a beer can be?.

Quick Summary

The highest alcohol beer, reaching 75% ABV, is achieved through unconventional brewing methods like freeze distillation and fortification. This article explores the record-holding beers, the science behind their potent strength, and the brewing controversies involved.

Key Points

  • Current Record Holder: The strongest percentage a beer can be is currently 75% ABV, a record held by Scottish Beithir Fire from 88 Brewery.

  • Beyond Fermentation: Reaching extreme ABV levels requires techniques beyond standard fermentation, as yeast cannot survive in such high alcohol concentrations.

  • Freeze Distillation: Many high-ABV beers, like German Eisbocks, use freeze distillation (removing frozen water) to concentrate the alcohol.

  • Fortification Controversy: Some breweries add distilled spirits to their beer, a practice called fortification, which sparks debate among purists about the product's classification.

  • Evolution of Strength: The record for the strongest beer has been progressively broken by several breweries over the years, often using innovative and controversial methods.

  • Not for Casual Drinking: Beers with extremely high ABV should be treated like spirits and consumed in small measures due to their potency.

In This Article

The World's Strongest Beers

For most beer enthusiasts, a high-alcohol-by-volume (ABV) beer might mean an Imperial Stout or Barleywine clocking in at a respectable 10-15%. However, a small group of extreme brewers have pushed the boundaries far beyond this, creating brews with an alcohol content that rivals hard spirits. The quest for the title of 'world's strongest beer' has been a battleground for years, with breweries pushing the limits of yeast tolerance and traditional brewing methods.

The Reigning Champion: Scottish Beithir Fire

The current record holder for the strongest beer in the world is Scottish Beithir Fire from the Scottish 88 Brewery, which boasts a staggering 75% ABV. The brewery achieves this by blending a high ABV barley ale with pure Scottish spirit after the initial fermentation and filtration. This process, while resulting in an extremely potent beverage, sparks debate in the brewing community about what truly constitutes a 'beer,' especially due to the fortification with distilled alcohol. Like other extremely high-ABV beers, it is recommended to be enjoyed in very small measures, similar to a spirit.

Brewing Techniques for Extreme Strength

Creating a beer with an ABV exceeding 15% is not possible with standard fermentation alone, as yeast has a natural alcohol tolerance and will die off before reaching such high levels. Extreme brewers employ advanced techniques to concentrate the alcohol content. These methods are what separate these potent brews from their more conventional counterparts.

Freeze Distillation (Eisbock)

This technique is central to creating many of the world's strongest beers and involves partially freezing the brew and then removing the ice crystals. Since water freezes at a higher temperature than alcohol, this process concentrates the beer, increasing its ABV and intensifying its flavor profile. Multiple freeze-distillation cycles can be used to achieve incredibly high concentrations. The traditional German Eisbock style uses this method, but modern extreme brewers have taken it to new heights.

Yeast Selection and High Gravity Wort

The process begins with brewing a high-gravity wort—meaning a liquid with a very high sugar content derived from a large quantity of malted barley. The brewer then selects specific yeast strains that have a higher alcohol tolerance than typical ale or lager yeasts. Some brewers even use multiple yeast strains, including champagne yeast, to push fermentation further. Proper oxygenation and nutrient additions are critical to keep the yeast healthy enough to survive the osmotic pressure of the high-sugar environment.

Fortification: The Controversial Method

As seen with Scottish Beithir Fire, some brewers choose to fortify their high-ABV beers by adding pure distilled alcohol to the finished product. While this is a fast and effective way to increase the ABV, it is a highly controversial practice. Critics argue that adding distilled alcohol makes the product a fortified spirit rather than a true beer, as it alters the traditional beer-making process fundamentally. This practice is a key point of contention when evaluating whether these super-strong concoctions truly deserve the title of 'world's strongest beer.'

A Comparison of Top High-ABV Contenders

Beer Name Brewery ABV Primary Method Controversy Status
Scottish Beithir Fire 88 Brewery (Scotland) 75% Fortification Yes, due to added spirit Current record
Snake Venom Brewmeister (Scotland) 67.5% Freeze-distillation + Fortification Yes, due to added alcohol Former record
The End of History BrewDog (Scotland) 55% Freeze-distillation Yes, packaging was taxidermy Former record
Schorschbock 57% Schorschbräu (Germany) 57.7% Freeze-distillation No, traditional method Former record
Start the Future Het Koelschip (Netherlands) 60% Freeze-distillation No, traditional method Former record

The Brewing Race to the Top

The quest for the strongest beer has led to a fascinating series of challenges between rival breweries. For instance, the fierce rivalry between Scotland's BrewDog and Germany's Schorschbräu saw them leapfrogging each other with increasingly potent Eisbocks in the late 2000s and early 2010s. BrewDog's infamous The End of History (55% ABV), presented in bottles housed in taxidermied animals, was one of the more unique—and controversial—stunts in this race. Following this, Scottish brewery Brewmeister and Dutch brewery Het Koelschip continued to push the limits, with Brewmeister’s Snake Venom holding the record for a time.

Is It Still Beer?

This is perhaps the most significant philosophical question surrounding these brews. For many purists, beer is defined by fermentation alone. The inclusion of freeze-distillation, while not adding foreign spirits, is a non-traditional method that significantly alters the final product, removing water and concentrating the alcohol and flavors. When a product is further fortified with added distilled spirit, like Scottish Beithir Fire, many argue it ceases to be beer and becomes more of a fortified wine or spirit. The debate is largely a matter of semantic definition and is unlikely to be settled anytime soon, with these extreme brews occupying a unique category all their own. A deeper understanding of these techniques and the definitions of beer can be found by researching the history of brewing methods and regulatory definitions.

A Concluding Perspective on High-ABV Beers

Ultimately, the strongest percent a beer can be is a figure that continues to be pushed by adventurous brewers. The current record of 75% ABV held by Scottish Beithir Fire is a testament to human ingenuity and a willingness to defy conventional brewing methods. These extreme beers are not for casual consumption but are prized by connoisseurs and collectors as remarkable feats of brewing mastery. Whether they are considered true beer or a different category of alcoholic beverage, they represent the innovative spirit and boundary-pushing nature of the modern craft brewing scene.


Highest ABV Beers

  • Scottish Beithir Fire (75% ABV): The current record holder from Scotland's 88 Brewery, achieved by fortifying a high-gravity beer with spirit.
  • Brewmeister Snake Venom (67.5% ABV): A former record holder known for its high ABV derived from freeze-distillation and additional fortification.
  • Het Koelschip Start the Future (60% ABV): This Dutch brew previously held the record, created primarily using the Eisbock freeze-distillation method.
  • Schorschbock 57% (57.7% ABV): A German freeze-distilled beer from Schorschbräu that was part of the high-ABV rivalry.
  • BrewDog The End of History (55% ABV): A notorious Scottish brew famous for its freeze-distillation process and taxidermy packaging.

Frequently Asked Questions

The strongest known percentage for a beer is 75% ABV, achieved by Scottish Beithir Fire from 88 Brewery using a method of fortification with distilled spirit.

To achieve such a high alcohol content, Scottish Beithir Fire is brewed as a strong barley ale, and after fermentation, it is blended with pure Scottish spirit in a process known as fortification.

Adding distilled alcohol, or fortification, is a method used by some extreme brewers but is controversial. Many traditionalists argue that adding spirits disqualifies the product from being called a true beer.

Freeze distillation is a technique where a beer is partially frozen, and the ice (which is mostly water) is removed, concentrating the remaining liquid's alcohol and flavor. This method, known as the Eisbock process, is used to increase ABV without adding distilled alcohol.

Yeast has a natural alcohol tolerance limit. Once the alcohol concentration becomes too high, it creates a hostile environment that kills the yeast, stopping fermentation before it can reach very high ABV levels.

Extreme ABV beers should be treated with the same respect as a potent spirit. They are meant to be sipped in small measures and not consumed in large quantities, as their alcohol content is comparable to whiskey or vodka.

Beyond ABV, a beer's perceived potency is influenced by its ingredients. Higher malt content, for example, can create a sweeter, fuller-bodied beer that may mask some of the alcohol's bite, while more hops can add bitterness for balance.

References

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.