Improved Whiskey Cocktail
Lemon zest twist
STIR all ingredients with ice and strain into ice-filled glass (preferably over a chunk of block ice).
[['3 cl', 'Straight rye whiskey (100 proof / 50% alc./vol.)'], ['3 cl', 'Bourbon whiskey'], ['0.5 cl', 'Sugar syrup (65.0°brix, 2 sugar to 1 water rich syrup)'], ['0.25 cl', 'Luxardo Maraschino liqueur'], ['1 dash', "Boker's bitters"]]
[['3 cl', 'rye whiskey'], ['3 cl', 'bourbon whiskey'], ['0.5 cl', 'sugar syrup'], ['0.25 cl', 'maraschino'], ['1 dash', "boker's bitters"]]