What is chartreuse alcohol and how is it made?

Chartreuse is a French liqueur made by monks since the 18th century. It is made from a secret recipe of 130 herbs, plants, and flowers macerated in alcohol. The mixture is then distilled and aged in oak barrels, resulting in a complex and herbal spirit with a distinct green color. Chartreuse comes in two varieties, green and yellow, with different flavor profiles and alcohol content.