Is a wild ale a sour?
As an expert sommelier and brewer, I can confidently say that a wild ale is indeed a sour beer. However, it is important to note that not all wild ales are sour, as the term “wild ale” encompasses a broad range of beer styles.
Wild ales are characterized by their use of yeast or bacteria, in addition to the traditional Saccharomyces cerevisiae, for fermentation. This additional microbial presence introduces unique flavors and aromas to the beer, often resulting in tart or sour characteristics.
One of the key microorganisms used in the production of wild ales is Brettanomyces, commonly referred to as “Brett.” Brettanomyces is a wild yeast strain that is known for its ability to create complex and funky flavors in beer. When present in a wild ale, Brettanomyces can contribute sour notes, alongside other flavors such as fruity, earthy, or barnyard-like qualities.
Another microbial component commonly found in wild ales is lactic acid bacteria, such as Lactobacillus or Pediococcus. These bacteria produce lactic acid during fermentation, which adds a distinct sourness to the beer. The intensity of the sourness can vary depending on factors such as the strain of bacteria used, fermentation conditions, and aging time.
It is worth mentioning that not all wild ales are intensely sour. Some may exhibit subtle tartness or acidity, while others can be quite puckering and acidic. The range of sourness in wild ales is vast, and it is part of what makes them so intriguing and diverse.
I have personally had the pleasure of tasting various wild ales throughout my career, and each one has offered a unique sour profile. From mildly tart and citrusy to boldly acidic and funky, these beers have always provided a fascinating sensory experience.
While not all wild ales are sour, many of them do exhibit sour characteristics due to the presence of additional yeast or bacteria during fermentation. The use of Brettanomyces and lactic acid bacteria can contribute to a wide range of sourness levels, making wild ales an exciting and complex category of beers to explore.