We've noticed barrel-aged cocktails popping up on a handful of lists, making this a true trend in drink-obsessed Denver. Our favorite comes courtesy of Randy and Ryan Layman, who whip up barrel-aged martinis at Steuben's. The brother bartenders make a fifteen-liter batch of Martinez cocktail and then put it in a Peach Street Distillers barrel for five to seven weeks, tasting it on a weekly or bi-weekly basis; when it hits the optimal point, they strain and rebottle the cocktail. The result is a silky drink that incorporates all of our favorite characteristics of a martini but has a rounder, sweeter and more caramelly note from its time on oak.