Equal parts:
Booker's (or other high-proof) bourbon - adust the bourbon up to balance.
Punt e Mes

Place a rocks glass in the freezer for about 15 minutes before making the cocktail.

Fill a mixing glass about halfway with ice. Add bourbon and Punt e Mes. Stir until drink is well chilled, about 20 seconds. Strain into chilled rocks glass. Serve.

Via http://www.seriouseats.com/recipes/2014/05/moto-guzzi-cocktail-h...