Liqueurs are used to give cocktails a twist of flavour, ranging from fruits to herbs and spices, and everything in between. As you explore cocktail recipes, you will find many of them require at least one liqueur, or cordial. These distilled spirits are a vital part of mixing drinks and many are essential to a well stocked bar. Brand names such as Benedictine, Campari, Cointreau, and Drambuie are common sights in many bars. Some of these have proprietary recipes with distinct, unique flavour profiles that cannot easily be substituted.