The Oaxaca Old Fashioned helped kick off the mezcal craze in the United States. Created in 2007 by New York bartender Phil Ward, the Oaxaca Old Fashioned introduced countless drinkers to the earthy spirit, which was unfamiliar to most consumers at the time. Ward first made the cocktail at Death & Co., the pioneering East Village bar, before placing it on the menu at Mayahuel, the dearly departed bar that he opened down the street.

The Oaxaca Old Fashioned—named for the Mexican state from where most mezcals hail—is a riff on the classic whiskey Old Fashioned. It mixes reposado tequila, which is lightly aged in oak and mimics some of those oaky flavors present in the classic Old Fashioned, and mezcal with Angostura bitters and agave nectar.

Référence: https://www.liquor.com/recipes/oaxacan-old-fashioned/