Żubrówka Bison Grass is a Polish vodka flavoured with bison grass (Hierochloe odorata), recognisable by the blade of grass placed in every bottle. Bottled at 37.5%, it is based on a grain distillate combined with a macerate of grass sourced from the Białowieża Forest.
It is produced by the Polmos Białystok distillery. Commercial production of bison grass vodka began at this distillery in 1928. The brand belongs to the CEDC group. The grassy raw material consists of two species of holy grass – sweet grass and forest holy grass – which grow in north-eastern Poland, particularly in the Białowieża Forest. These are small plants, from 40 to 60 cm tall, with a characteristic, strong scent of coumarin – a substance with an aroma of fresh hay, honey and bison hide. The grass grows exclusively in the wild, under natural conditions, and the harvest begins as early as mid-June and lasts until October; in summer it is lush green and very fresh.
The method of preparing the aroma is based on macerating the grass. Producing bison grass macerate is a two-stage process consisting of water and alcohol maceration, in which the hay is placed in special devices called macerators, allowing the grass to circulate with the extracting agents; the process takes place under strictly controlled conditions, and the resulting essence is left for several days to season. After filtration, a liquid of an intensely green colour is obtained, with the taste and scent of freshly mown hay, which is then used to flavour the spirit and water that form the main component in the production of Żubrówka.
The aromatic profile is dominated by notes derived from the grass. Distinctly aromatic, herbal and grassy, with citrus, vanilla, lavender, tobacco and iced jasmine tea. The grass itself gives the vodka a slightly greenish hue and a subtle character. This Polish product is flavoured with Hierochloe Odorata grass, a blade of which is immersed in every bottle, giving it a semi-transparent, greenish colour and a subtle taste.
In Poland it is most often combined with apple juice. Żubrówka is sometimes mixed with apple juice, preferably unfiltered; the drink is known in Poland as szarlotka (apple pie), and abroad it is sold under the name Apple ŻU.