1/4 oz Peychaud's bitters
1/4 oz Angostura Orange bitters
1/2 oz Angostura bitters
1/2 oz Lemon juice
1/2 oz Fernet
1/2 oz Simple syrup
1 oz Rum (preferably Barbancourt 8 year)
Combine in an ice-filled glass and shake for 15-20 seconds. Strain into a cocktail glass or serve down in a chilled, empty rocks glass.
Enjoy.