Bourbon barrel-aged imperial stout. Aged in bourbon barrels for over a year, this extremely rich stout has picked up flavors of vanilla, burnt caramel, toasted oak, prunes, and sherry-like oxidation. 2009: 19.5% 2010: 18.2% 2011: 18.3% 2012: 19.2% 2013: 18.9% 2014: 19.7% 2015: 19.9% 2016 : 20.3% 2017: 19.5% 2018: 19.2% 2019: 19.4% 2020: 19.3% 2021: 18.9% 2022: 19.7% 2023: 19.5%