The storied hangover cure from 1940's Cairo. A Dark 'n Stormy when you're out of rum.
1oz London Dry Gin
1oz Bourbon.5oz Lime Juice
.25oz Demerara Syrup
Two Dashes Angostura Bitters
Ginger Beer
Shake everything but the ginger beer with ice. Strain into a Collins glass with fresh ice. Top with ginger beer. Garnish with mint.