Funny Duck

Ingredients
  • 1 1⁄2 oz Bourbon, Maker's Mark
  • 3⁄4 oz Sweet vermouth, Martini & Rossi (maybe Cinzano.)
  • 3⁄4 oz Bénédictine
  • 1⁄3 oz Averna
  • 1 ds Bitters, Angostura