Big Boss
Orange zest twist
STIR all ingredients with ice and strain into ice-filled glass (preferably over a chunk of block ice).
[['4.5 cl', 'Straight rye whiskey (100 proof / 50% alc./vol.)'], ['1.5 cl', 'Disaronno amaretto'], ['4 drop', "Bob's Vanilla bitters"]]
[['4.5 cl', 'rye whiskey'], ['1.5 cl', 'amaretto'], ['4 drop', "bob's vanilla bitters"]]