Side Project Double Barrel Derivation Beer
True to its name, the line of beer from Side Project Brewing known as Derivation becomes something entirely new after time spent in barrels. The most sought after beer in this line is arguably Double Barrel Derivation, an Imperial Stout aged for two years in Willett 12-year-old barrels before being racked to Port barrels for three months of finishing. It's then bottled and naturally conditioned for eight months before being released to the public.