The Cognac Sour is a classic cocktail that combines the rich flavors of Cognac with the tartness of citrus. Typically, it includes ingredients like fresh lemon juice, simple syrup, and sometimes egg white for a frothy texture. The drink is shaken with ice and served in a chilled glass, often garnished with a lemon twist or cherry. This cocktail is a variation of the traditional sour family, which includes drinks like the Whiskey Sour. The balance of sweet and sour makes the Cognac Sour a refreshing choice, appealing to both Cognac enthusiasts and cocktail lovers alike.