Lambics are a specific category of Belgian beers made through spontaneous fermentation, a traditional process distinguished by exposing the wort to air so that natural yeasts and bacteria from the environment can ferment it, instead of using controlled yeast cultures.
After the wort is cooled in a "coolship", a wide open vessel, it is transferred to barrels where it ferments slowly for months or years under the influence of natural microorganisms, including yeasts such as Brettanomyces and lactic bacteria.
Lambics represent an essential pillar of Belgium's brewing heritage, particularly in the Pajottenland region and the Zenne valley, around Brussels. Lambic beers stand out not only for their brewing method, but also for capturing the essence of their local terroir , offering a highly complex flavour profile.
There are also several styles derived from Lambic, each offering a unique character:
Gueuze: A blend of young and mature Lambics that ferments again in the bottle, resulting in an effervescent and balanced drink.
Raspberry and Kriek: Lambics enriched with raspberries or cherries respectively, where additional fermentation with the fruit adds complexity and softens acidity.
Faro: A version sweetened with brown sugar or caramel, contrasting Lambic's typical acidity with more pronounced sweetness.
Spontaneous fermentation: nature in action
Unlike most beers, which use carefully selected yeasts, Lambic beers depend on a process of spontaneous fermentation. After the wort is boiled, it is left in open vessels known as coolships, where it is exposed to open air. In the Senne valley, near Brussels, wild yeasts and bacteria such as Brettanomyces and Lactobacillus begin fermentation. This process can last for years and gives Lambics their characteristic acidity, as well as earthy and fruity flavours.
Prolonged ageing
The Lambic beers usually age in wooden barrels for one or more years. During this time, the beer continues fermenting and developing complex flavours. Lambics are often blended with beers of different ages to create styles such as Gueuze, a blend of young and old Lambic that produces an effervescent and complex beer.
Fruit in Lambic
A subgroup of Lambics are Fruit Lambics, which include fruit during the ageing process. Two classic examples are Kriek (Lambic with cherries) and Framboise (Lambic with raspberries). These fruits not only add sweetness and fruity flavour, but also interact with wild yeasts, adding another layer of acidity and complexity to the beer.
A protected style
Traditional Lambic beers are protected by the designation of origin in the Pajottenland region and the Senne valley. Only beers made in this region using traditional methods may be labelled Lambic. This protection ensures that the tradition of spontaneous fermentation and prolonged ageing continues in its authentic form.
Lambics as cultural heritage
Lambics are not just a drink, but an essential part of Belgian cultural heritage. In an age when industrial production has standardised many beer styles, Lambics represent a connection with ancestral methods, when beer was made with local resources and nature played an important role in the process. This style has survived for centuries, staying true to its roots in a rapidly evolving world.
A living product in constant change
The Lambic beers are not just static beers; they are living products that evolve and change even after bottling. Their character continues developing over time, giving enthusiasts the chance to enjoy a different experience in each bottle depending on its age and storage. This process of continuous fermentation in the bottle is what makes Lambics one of the most complex and fascinating beers in the world.
What differentiates a Lambic from a Sour?
Although both are acidic, Sours represent a broader category that can include many styles (including Lambics) and different fermentation techniques.
Buy Lambic beers online
Selection of spontaneously fermented Lambic beers, with acidic and complex profiles typical of Belgian brewing tradition.
Lambic: Belgium's wild character
