Native to southern Europe, licorice is cultivated around the Mediterranean and in parts of the United States. An effective mask for the taste of medicines, licorice is an ingredient in cough lozenges, syrups, and elixirs. It is a flavouring agent in candies and tobacco. In medicine, licorice has been used to treat peptic ulcers and Addison's disease.

The herb may grow up to 1 metre (3 feet) tall and has compound leaves with four to eight oval leaflets, axillary clusters of blue flowers, and flat pods from 7 to 10 centimetres (3 to 4 inches) long. The roots used are about 1 m long and about 1 cm (0.4 in.) in diameter. They are soft, fibrous, and flexible and are coloured bright yellow inside. The distinctive sweetness of licorice is imparted by a substance called glycyrrhizin.

The preparation of the juice by boiling crushed and ground roots is an industry along the Mediterranean coasts. The pliable, semi-vitreous stick form of licorice candy, also called licorice paste or black sugar, is processed from the thickened juice.