Quadruple Rye Barrel-Aged Imperial Stout Elevating an already legendary imperial stout, One & Dunn Imperial Grand Reserve is aged in 4 different barrels over 4 years. This viscous brew carries bold aromas of oak, roast, and dark chocolate leading to an onslaught of earthy spice, molasses, and rich chocolate flavors. Each glass of this remarkable beer finishes with a lingering, robust intensity pairing perfectly with a bold cigar or fried pork belly.