There has been a tremendous rise in consumption of kombucha in recent years. In Portland, Oregon, there are a growing number of local kombucha makers such as Eva’s Herbucha and Brew Dr. Kombucha. In some locations, such as local Wholefoods stores, kombucha on tap has become quite a phenomenon.

Kombucha is a lightly fermented tea and has a long history as a home-made folk remedy going back to Russia and Asia. In short, sugar is added to a black or green tea and the kombucha culture ferments the tea.

The kombucha culture is a combination of yeast and bacteria, including bacteria of the Acetobacter genus and several yeasts, which may include Saccharomyces cerevisiae and/or Brettanomyces bruxellensis. Regular commercial kombucha has an alcohol percentage less than 0.5% but there have been commercial examples with higher percentages and it is possible to deliberately brew kombucha with a higher alcohol content. Of course, such a kombucha would no longer be exempt from laws that pertain to alcohol beverages.

The acetic acid and gluconic acid that is produced during fermentation give kombucha its characteristic tart taste. Not surprisingly, people who like sour beers such as lambic and the Flanders reds often like kombucha as well (I certainly do!). Since I have been writing this blog I have read a number of suggestions of blending lambic (or a regular sour ale) with kombucha. I was therefore quite pleased to learn about Vanberg & DeWulf’s Lambrucha. Lambrucha is not available in Oregon yet, but I recently was able to sample a bottle.

Lambrucha is a blend of lambic and organic green tea kombucha that clocks in at a 3.5% alchohol percentage. The lambic that is used in this brew comes from De Troch. I have not been able to find detailed technical information about how this drink was fermented or blended (some background on the Lambrucha beer can be found here), but the process of blending lambic (or any beer) and kombucha raises some interesting technical questions. For example, blending lambic and kombucha can be an interesting method to raise acetic acid in a lambic – an approach that might be tricky relying on spontaneous fermentation alone. But I will leave these issues to the side for another blog post after I have studied kombucha in more detail and have done some of my own experiments. The Mad Fermentationist website has a number of interesting entries on beer and kombucha here.

Lambrucha has a light orange/caramel color. A relatively careful pour produced a two finger head, but this dissipated quickly. The aroma is quite funky with the typical “horseblanket” brettanomyces, overripe fruit, and some malty and yeasty notes (for a more concentrated version of these qualities, pour the dregs into a separate glass). The kombucha and the lambic can both be identified in the taste, although I would characterize it more as a strong kombucha than a low alcohol lambic since the tea appears to be stronger than the malt. A taste of lemon gives way to a short finish of cucumber (!), something that I have not tasted in a beer before.  The sourness is more concentrated and crisper, presumably from the low alcohol content. Carbonation is quite high and there is some astringency, too. Drinkability is great.

The tartness and low alcohol percentage make for a an extremely refreshing drink. Some might say that this beer is a little too drinkable! If the price would not prohibit it, this would be a great session beer, or it can be served with fish.

Naturally, the producers made a number of test brews with  different lambic/kombucha ratios and I only tasted the winner of this process. It would be quite interesting to taste different interpretations in the future. Lambrucha is by no means the last word on blending beer and kombucha. Goose Island has produced a Belgian pale ale with hibuscus and kombucha called Fleur. And homebrewers have discovered that Kombucha (culture) could be another trick to produce sour beers.

It is interesting to note that De Troch collaborated on this beer. As I wrote in my recent account of Toer de Geuze, some lambic breweries have the equipment and skills to make traditional lambic products but only use it as an (obligatory) step in the production of (pasteurized) sweetened lambics. Now that the tide has been turning, and traditional lambic brewing is gaining in recognition and sales, we may see breweries like De Troch start doing interesting things again. Ironically, this Lambrucha beer may be one of the best things that they have released to the market in awhile!

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