METHOD OF BREWING FLAVOURED DARK BEER Russian patent published in 2010 - IPC C12C12/00 

FIELD: chemistry.

SUBSTANCE: invention relates to brewing technology. The method involves mixing tarragon and hop, extraction of the obtained mixture with liquid nitrogen and separation of the corresponding miscella. Yacon is then cut, dried in a microwave field at given process parametres and roasted. The yacon and malt are then mixed. The obtained mixture is saturated with the separated miscella while simultaneously increasing pressure. Pressure is then released to atmospheric pressure level, while simultaneously freezing the mixture and cryogenic grinding in the medium of released nitrogen. Water is added and saccharification is carried out to obtain wort. Brewing yeast is added and primary fermentation, fortification, after fermentation and filtration are carried out.

EFFECT: method shortens duration of the process and increases foam stability of the end product.