Normally I have bourbon. Neat. I have an extensive collection that would make a well stocked bar jealous.
But over the last year I've been playing with a bourbon cocktail called a Boulevardier. The Boulevardier is simply a variation on the classic Negroni that is adored for its balance of bitter, boozy and sweet. The difference in flavor, however, is anything but simple. While the gin-based Negroni is crisp and bracing, the whiskey-based Boulevardier is rich and warming. It’s the exact drink you want to reach for on a chilly fall or winter evening. Temps dip into the 50's or colder, opt for a nice Boulevardier.
1 part Campari
1 part Sweet Vermouth
1.25 to 1.5 parts Bourbon (or Rye whiskey)
Typically garnished with Orange peel, but I usually use Orange Bitters in mine.
Bourbon makes for a slightly sweeter drink. Rye whiskey works well too, but gives it a bit of a spicier edge.
Campari is a bitter drink with herbal complexity.
Sweet Vermouth seems to be the key to this drink. Cheap Sweet Vermouth destroys the flavor, good brands elevate this cocktail. Antica is probably the best of the best for a Boulvardier, but Dolin is very good. Nolly-Pratt has a few different offerings that make it pretty good to but skip past the low end Martini & Rossi. I'm happy, on a summer day, with a M&R vermouth over ice with lemon, but not in my Boulevardier cocktail.
Honestly any decent bourbon works great in this so grab a basic Makers Mark, Larceny or Bulleit. Basically your favorite brand is going to make your favorite version of this drink. But buy the really good Sweet Vermouth!
If you keep oranges in your home, garnish with an orange. I typically don't have oranges here so I substitute several dashes of Orange Bitters. I have a couple different brands, don't really notice much of a difference between the specialty brands and the mainstream.