Old Fashioned Cocktail (Difford's recipe)
Orange zest twist
STIR all ingredients with ice and strain into ice-filled glass.
[['4.5 cl', 'Bourbon whiskey'], ['3 cl', 'Straight rye whiskey (100 proof / 50% alc./vol.)'], ['1 cl', 'Demerara / dark Muscovado sugar syrup (2 sugar to 1 water)'], ['9 drop', "Bob's Abbotts bitters"]]
[['4.5 cl', 'bourbon whiskey'], ['3 cl', 'rye whiskey'], ['1 cl', 'demerara syrup'], ['9 drop', "bob's abbotts bitters"]]