What is unique about Tokaji Eszencia regarding its fermentation process?

Tokaji Eszencia is notable for its extended fermentation process, which can take several years. This wine is made from grapes affected by noble rot (Botrytis cinerea), resulting in extremely high sugar levels. The exceptionally high sugar concentration leads to a slow fermentation because the natural yeast present must gradually convert the sugars into alcohol. As a result, the fermentation process can be prolonged, sometimes lasting for several years, which is a distinctive characteristic of Tokaji Eszencia.

In contrast, other wines may ferment more quickly due to lower sugar levels or different winemaking practices. While Tokaji may be fermented in various types of containers, it is not specifically known for fermentation in large oak barrels, and the alcohol content, although present, is not what defines its unique fermentation process.