Part of Four Roses' Single Barrel Collection launched for the 20th anniversary of the flagship OBSV Single Barrel; OESK pairs Four Roses' lower-rye "E" mash bill with its "K" yeast strain, aged 7-9 years and bottled at 100 proof. Four Roses' ten recipes (combinations of two mash bills and five yeast strains) are central to what the distillery calls its signature "mellow spice."