Bison Grass Vodka, is a dry, herb-flavored vodka that is distilled from rye and bottled at 40% alcohol by volume (80 proof). Its flavor is unique and is described as having woodruff, vanilla, coconut, and almond notes.
The rye distillate is flavored with a tincture of bison grass (Hierochloe odorata), which also gives the spirit its yellowish color. This grass grows in the Bialowieza Forest and elsewhere. A blade of bison grass is traditionally placed in each bottle of Zubrówka, though this is largely decorative.