No Strucchi so made the Tempus Fugit version tonight with their Gran Classico bitter and their Alessio vermouth; the rye was WhistlePig. The Xocolatl Mole bitters are NOT "optional," otherwise this is just a Rye Boulevardier with a flamed garnish. The interplay between the dash (or "squirt" given that the bottle has a dripper rather than a dash top) of Xocolatl mole bitters and the 3 substantial ingredients is what raises this above the level of an ordinary Boulevardier. Five stars! Lou Anselm's link to cocktailvirgin.blogspot.com is clarifying regarding its origins as a Boulevardier/Negroni variant.

I used Bruto Americano for a sublime Campari-style update.

Just for fun, here is a lot more history of this 1794 cocktail.

First, this link, going way back to 2007:
https://cocktailvirgin.blogspot.com/2007/12/blog-post.html

Second: this link:
https://cocktailvirgin.blogspot.com/2010/03/1795.html