A cocktail invented around 1918 in either London or Paris. To make it, you take eight parts brandy or cognac, mix with two parts orange liqueur (Cointreau, Grand Marnier, or another triple sec), and one part lemon juice. To serve, you mix the ingredients in a shaker half-full with ice, then strain and serve in a sugar-rimmed glass, and finally garnish with a strip of lemon rind. You can also use vodka, bourbon, or gin in place of the brandy and/or cognac
Man, the bartender at that restaurant made the best damn sidecar I ever had.