Shake all ingredients with ice for 15 seconds, strain into a chilled coupe. Garnish with a pigtail lemon twist.
While I like the Sfumato in this, I've used other amari as well, such as Zucca (more berry notes, less smoke) and Cynar (less smoke, more caramel notes).
Trying to use up a bottle of creme de cassis while hunkered down during the coronavirus lockdown. Part of my "Cocktails from the Corona Bunker" series. :-)