
Herbal liqueur is a sweetened spirit flavored with herbs, roots and spices. Green Chartreuse, made by Carthusian monks from a secret recipe of 130 plants, is the defining example.
Yellow Chartreuse
The nearest swap, in the same measure. It is sweeter and lower in proof, so the drink is softer, and any syrup can come down.
Génépy
This works at the same measure too, though it is lower in proof and usually less sweet than green.
Bénédictine or an amaro
Use these only in a pinch. They change the drink much more.
High sugar and alcohol keep an opened bottle sound for years, though the aroma slowly fades. Green Chartreuse goes on changing in a sealed bottle, and old bottles are collected for that reason.
Last Word
London dry gin