Once Upon a Time in the West

Chill your Old Fashioned glass.

Combine mezcal, Amaro Nonino, sweet vermouth, and 2 dashes of chocolate bitters in a mixing glass.

Fill the mixing glass with ice and stir until the mixture is well-chilled and properly diluted.

Strain the cocktail into the chilled Old Fashioned glass.

Garnish with an orange peel, expressing its oils over the drink before placing it in the glass.