Koum Quat is a liqueur from the Greek island of Corfu, made from kumquat, a small, sweet-tart citrus fruit rich in flavor. The island of Corfu is particularly known for its kumquat production, and this fruit is used to make various products, including the Koum Quat liqueur.
The liqueur is typically made by macerating kumquat fruit in a strong spirit and adding sugar. The mixture is left to infuse for several weeks or, in some cases, months, allowing the flavors to blend together. The result is a sweet, citrusy liqueur with a vibrant orange color, usually between 20 and 25% alcohol by volume.