Build in a rocks glass, give a quick stir (no ice), and garnish with a grapefruit twist.
The drink was served with aged agricole, but blanc would work well. And it was created with cachaça so feel free to substitute -- I did so when I put it on a menu for a guest shift at Backbar in 2017.
For our night (Katie Emmerson of the Hawthorne and me) of the Whiskey & Amari night series, we did a Women of the Wild West themed menu of 9 drinks to go along with the Spaghetti Westerns playing on the televisions. That night was the birthday of Matt Schrage, the series organizer, and he requested a birthday Scaffa to be created. Scaffas are old school room temperature drinks that would be cocktails if there were the water/ice component of the 1806 definition of spirits, sugar, water, & bitters.
Since neither Katie nor I had come up with a rum drink, I started on that route. Cynar and agricole were a natural pairing, and Drambuie provided the body and sweetness to balance the alcohol heat (since there is no chilling and waterization to balance that). I named it after one of the famous characters of the Wild West, Eleanore Dumont. Dumont kept her mustache that developed later in life and utilized it as a gimmick at the brothel she ran.