Shaken and served in a highball glass.
Short shake all ingredients (except the champagne) with 3 ice cubes, then strain into a fizz glass over 2 ice cubes. Top with champagne. No garnish.
Rye Whiskey, Benedictine, Sweet Vermouth, Absinthe, and Peychaud's Bitters
Bourbon, Lemon Juice, Creme De Cassis, Simple Syrup, and Angostura Bitters