The Frankfurt Martini is a sophisticated and elegant cocktail that combines gin, dry vermouth, and a splash of apple liqueur. It is stirred with ice and strained into a chilled martini glass, garnished with a twist of lemon peel. The Frankfurt Martini is a smooth and aromatic cocktail that balances the herbal notes of gin with the subtle sweetness of apple liqueur. It's a perfect choice for those looking for a classic cocktail with a Frankfurt twist.