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 lemon-balm and hop. The obtained mixture is extracted using liquid nitrogen with separation of the corresponding miscella. Yacon is cut, dried in a microwave field at given process parametres and roasted. Yacon is mixed with malt. The obtained mixture is saturated with the separated miscella while simultaneously increasing pressure. Pressure is decreased to atmospheric pressure level with simultaneous freezing of the mixture. The mixture is subjected to cryogenic grinding in the medium of the released nitrogen. Water is added and the mixture is saccharified to obtain wort. Brewing yeast is added to the wort. Primary fermentation, fortification, after fermentation and filtration are then carried out.

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