Culture vs. Chemistry

One of the most common debates surrounding lambic today is whether or not lambic can be produced outside of the Senne Valley. Minimally, there are four things to consider in trying to reach a satisfactory answer to this question: the product, the process, regulation, and the culture.

The Product

Is it possible to create a finished product, outside of the Senne Valley or the country of Belgium, which is biochemically indistinguishable from traditional lambic? Until the late 1800s, people assumed that the right combination of wild yeasts for lambic only existed in the Senne Valley. Shortly after the turn of the 20th century, it was discovered that these yeasts already existed elsewhere in the world. In 1904, Danish brewing scientist Niels Kjelte Claussen found the yeast Brettanomyces in English beer. He presented his findings to the British Beer & Pub Association and later published them in the Journal of the Institute of Brewing. Because he found these yeasts in British beers, he chose the name “brittanomyces” (the Greek word for “British fungus”). However, a typesetter’s error changed this to “brettanomyces,” with an e.

While individual microorganisms are not unique to the Senne Valley, the specific combinations of these organisms are terrior specific. For example, in 1993, Frank Boon was said to have discovered 86 unique strains that he believed played a significant role in the fermentation at Boon. .

If the yeasts for lambic are not geographically limited to the Senne Valley, is it theoretically possible for brewers, with more developed and scientifically-driven techniques, to replicate the ratios and quantities of the various strains of Brettanomyces and other microorganisms outside of Belgium? Possibly, but it would require discipline and a strong traditional focus without significant experimentation. However, there are more issues that come into play.

The Process

Lambic is much more than the yeasts themselves. The brewing process for lambic is completely unique, and involves the following:

• The unique turbid mash brewing process
• An extended boil, designed to develop proteins and amino acids that protect against oxidation and acid formation, creating a wort where only certain micro-organisms can survive
• A limited brewing season controlled by seasonal temperatures
• The use of a koelschip and spontaneous fermentation
• Spontaneous fermentation in wooden barrels, ripe with wild yeast
• The terroir of the building itself, from the ceiling to the floor as well as the local surroundings
• A complex aging process, in which different wild yeasts impact the liquid differently at different phases of the beer’s development
• A blending process involving multiple barrels of lambic, often from multiple years, to create a product that will mature into something great

This process is as much a tradition as a recipe. With the intense physical demands, constant attention and care required, and seasonal brewing cycles, being a lambic brewer is not just a job, but a way of life This is passed down from generation to generation.

Returning to our question of the viability of a non-Belgian lambic, the brewing process of spontaneous fermentation plays a critical role. A spontaneously fermented beer gets its yeast naturally from the air during the wort cooling process. This is perhaps the best known part of the lambic-brewing process, and every lambic brewer will tell you that if it is not spontaneously fermented, it is not a lambic.

Given the balance of yeasts found in the Senne Valley is a primary creator of lambic’s flavor profile, and that spontaneous fermentation is equally crucial to the proper production of lambic, any attempt to move lambic production elsewhere creates a tension between these two aspects of lambic brewing which were previously in perfect harmony. It forces the brewer to ask which is more important: the biochemical composition/yeast content or the method of brewing. This is not a question that any lambic brewer in Belgium has to ask, or would want to. The brewer would be forced to ask himself: Which is more important: that lambic tastes like a lambic, or that lambic be made like a lambic?

Spontaneously fermented beers can be produced anywhere, capturing the yeasts that are local to that geography, following brewing processes similar to those of a traditional lambic. Jeff Sparrow reminisces in Wild Brews: Culture and Craftsmanship in the Belgian Tradition of a conversation that he had with Jean-Pierre Van Roy:

“But don’t despair; believe it or not, you can spontaneously ferment beer anywhere in the world. Jean-Pierre Van Roy of the Cantillon brewery in Brussels told me so on my first visit. I just didn’t know what to make of the statement at the time. Since then, Van Roy’s revelation has become a great deal clearer. Van Roy told me you must develop a taste for your own local lambic, although he never had to taste one result of his suggestion.”

Despite the recent rise in the use of coolships and spontaneous fermentation outside of Belgium, there is still significant variation in the processes and techniques used to produce these new wild ales in other regions. With this experimentation comes a wide variety of wild ales. Nothing, in theory, prevents brewers from precisely replicating the process of lambic brewing used in Belgium elsewhere, or from using the same yeasts in the same ratios as they are found in the Senne Valley in their brewing process. However, wild ales may lack the complexity, possess different characteristics based on the regional terrior, they may not age and develop in the bottle well, or they be significantly out of balance. They can taste very different from a traditional Belgian lambic. Often, these beers are brewed specifically with sour as a goal, as opposed to allowing the beer to develop naturally in a variety of ways, with a tartness being one of those bi-products.

Regulation

Naturally, Belgian brewers and lawmakers have wanted to protect and preserve their indigenous product. Lambic has, like many other popular regional products throughout Europe, been regionally protected through law and decree. The first attempts to protect lambic dates back to 1930. In 1965, the Belgian government imposed restrictions on the use of the names Lambic, Geuze, and Kriek requiring spontaneous fermentation and the use of specific raw materials. In 1997, five lambic related products were protected by being granted Traditional Specialties Guaranteed (“TSG”) status. Within Europe, protects the brewing style, however it does not tie the beer specifically to a region. Since 2004, brewers of Lambic can also apply for a regional label indicating that it is regional and traditional.

Culture

One of the most unique aspects of lambic in Belgium is its attendant culture – both that in which it has grown up, and that which has grown up around it. Lambic is both a reflection of Belgian terroir and culture and a contributor to that same culture. From a cultural perspective, can lambic be replicated? Lambic represents hundreds of years of history. It represents a culture that identified the unique natural characteristics of a region and leveraged this terrior to produce a product unlike any other. It represents a completely unique localized brewing style where each step was developed specifically to capture and enhance the effects of the region. It represents hundreds of years of family history, breweries that have come and gone, and a culture where bars and restaurants would buy wort and create their own lambic. It represents the annual pilgrimage of beer geeks worldwide who journey to Belgium to experience lambic.

Brewers are ingenious. They have and will continue to brew wild ales in other regions, either through the use of that region’s local terrior or through chemistry and microbiology. They will follow many of the steps described above that are unique to lambic. But beyond that, they experiment and make their own beers, changing the process to create their own unique beverages. Experimentation is good and should be encouraged. We do hope however, that brewers truly attempting to create a Belgian style lambic respect this amazing style, create a product that can stand the test of time, and strive to brew a complex beer that’s much more than just “sour” or “funky”. We hope that they respect the regional history of the Belgian Lambic itself, and instead make their own wild ales, indigenous to their own region, brewery and history.