Made it with Amaro del Capo and, as much as I love the combination of Whiskey and amaro, imo it's inferior to a well made Whiskey Sour.

Amazing! Lots of herbs and spices, basically a gingerbread man in a glass. Subbed tobacco bitters with a mix of Peychauds and Bitter Truth Chocolate Bitters, never had a cocktail that tasted so much like Christmas spices.