A Sidecar is a classic cocktail made with cognac, orange liqueur, and lemon juice. The recipe for a Sidecar has evolved over time, with earlier versions calling for equal parts cognac, Cointreau, and lemon juice, while later versions use two parts cognac, one part Cointreau, and one part lemon juice. The drink is typically served in a sugar-rimmed glass, although this is optional. The origins of the Sidecar are unclear, with some stories attributing its creation to an American army captain stationed in Paris during World War I, while others credit a French or English bar. Regardless of its origins, the Sidecar remains a popular cocktail today and is known for its balance of sweet and tart flavors.