The Conference
Lemon & orange zest twists
STIR all ingredients with ice and strain into ice-filled glass (preferably over a chunk of block ice).
[['1.5 cl', 'Bourbon whiskey'], ['1.5 cl', 'Straight rye whiskey (100 proof / 50% alc./vol.)'], ['1.5 cl', 'Avallen Calvados'], ['1.5 cl', 'Rémy Martin 1738 Cognac'], ['0.5 cl', 'Demerara / dark Muscovado sugar syrup (2 sugar to 1 water)'], ['2 dash', 'Angostura Aromatic Bitters'], ['1 dash', 'Xocolatl mole bitters']]
[['1.5 cl', 'bourbon whiskey'], ['1.5 cl', 'rye whiskey'], ['1.5 cl', 'calvados'], ['1.5 cl', 'cognac'], ['0.5 cl', 'demerara syrup'], ['2 dash', 'angostura'], ['1 dash', 'xocolatl mole bitters']]