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

FIELD: chemistry, brewing.

SUBSTANCE: invention relates to the food industry, particularly to beer brewing technology. The method involves extraction of hop using liquid nitrogen with separation of the corresponding miscella, cutting, drying in a microwave field with given process parametres and roasting chicory, mixing chicory and malt, impregnating the obtained mixture with the separated miscella with simultaneous increase of pressure, reducing pressure to atmospheric pressure level with simultaneous freezing of the mixture, cryogenic grinding in the medium of the separated nitrogen, addition of sugar, pouring drinking water and saccharification to obtain wort, addition of brewing yeast, primary fermentation, after fermentation and filtration.

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