conditioning cask beer
Cask Conditioning is the process in which a draught beer retains yeast to enable a secondary fermentation to take place in a cask in the pub cellar. Cask conditioned beer is the traditional drink of the British pub, and served properly, it can be among the most subtle and beguiling of beer types. Beer that is cask conditioned is neither filtered nor pasteurized and is often called cask ale, real ale, or in Britain, traditional ale.
