Created on the fly for a guest a table who asked a server for "something like a Negroni but kind of caustic," and this is what I whipped up. He liked it so much, that another was ordered by someone else at the bar.
Thanks for the back story Fred. It's been well over a year since I tried this, but your recent comment made me re-visit this drink. I just whipped this up as a post shift drink using Carpano Antica Formula instead of the Cinzano + vanilla syrup combo (which seemed apropros given CAF is a rich vanilla bomb compared to the Cinzano). Didn't have Cinzano on hand to do a direct comparison, but it was plenty rounded with the CAF, if anyone is looking for an easy sub. Might also try this with Abano swapped in for the Averna, been on a Abano kick lately. And the grapefruit oil / aroma really does tie it all together nicely (a trick I've frequently used myself with stirred Scotch based drinks).