2oz rye whiskey
dash Angostura bitters
Wonderfully balanced flavor, and awfully good with the brownie sundae... I'm just saying! I really liked this one and wonder if it might be a more gentle introduction to Fernet than taking a shot. Although I will say, I've managed to cajole three newbies in as many weeks into doing such a thing and all enjoyed the experience.
Well, except for C. the next morning: he did so after two Gibsons, and then some Rittenhouse 100 neat... over the course of something like an hour. Actually, I shudder to think what he would have felt like were it not for that Fernet at the end!