The Frankfurter Mule is a Frankfurt-inspired twist on the classic Moscow Mule. It combines vodka, ginger beer, lime juice, and a splash of apple juice. The cocktail is served in a copper mug filled with ice and garnished with a lime wedge. The Frankfurter Mule is a refreshing and zesty cocktail that combines the spiciness of ginger beer with the crispness of apple juice. It's a perfect choice for those looking for a unique and flavorful cocktail in Frankfurt.