Fill a rocks glass to the top with ice cubes
Pour 0.5 oz of lime juice, 0.35 oz of elderflower syrup, 0.75 oz of dry orange liqueur and 1.5 oz of Scotch whisky into a shaker
Add 5 dashes of orange bitters
Fill the shaker with ice cubes and shake
Strain into the rocks glass
Garnish with orange zest