The sidecar is a cocktail traditionally made with cognac, orange liqueur, plus lemon juice. In its ingredients, the drink is perhaps most closely related to the older Brandy Crusta, which differs both in presentation and in proportions of its components. The exact origin of the sidecar is unclear, but it is thought to have been invented around the end of World War I in either London or Paris. The drink was directly named for the motorcycle attachment, which was very commonly used back then.
Add the cognac, orange liqueur and lemon juice to a shaker with ice and shake until well-chilled.
Strain into the prepared glass.
Garnish with an orange twist.