... or even as a perfectly legit substitute for gin
"One of my all-time favorites to sub bourbon into: the Pink Lady. In place of the gin, I suggest choosing a lighter, more oaky, low-proof bourbon. It will marry well with the apple brandy, giving it a very fall-forward, apple-spice backbone. The lemon lightens up the concoction, and the true grenadine will give it a berry-forward pink hue. Egg white creates a light, frothy mouthfeel.”
-- Ashley Towning, beverage director at Red Lane Jane
"A Negroni made with bourbon is called a Boulevardier. In this version, the flavors all balance and play off one another really well. Sweet vermouth, Campari, and bourbon sort of create this Venn diagram of flavor: the bitterness from the Campari; the sweet, musty flavor of the vermouth; and the complexity of the bourbon with vanilla and spice and oak. These flavors really work well together."
-- Jeremy Salmon, lead bartender, Garage Bar