Four Roses OBSF is a single barrel bourbon known for a rich flavor profile featuring notes of mint, apple, rye, brown sugar, and cocoa. The "O", "B", "S", and "F" in the name denote its specific recipe: distilled at the Four Roses distillery (O), using a high-rye mash bill (B), and a yeast strain (F) that contributes mint and herbal qualities. It is a limited-release expression often aged for 7-9 years, offering a luxurious and robust experience.