
Herbal liqueur is a spirit flavored with a complex blend of botanicals, roots, and spices — Green Chartreuse, made by Carthusian monks from a secret recipe of 130 plants, is the defining example.
Yellow Chartreuse is the nearest swap, one for one. It is sweeter and much lower in proof, so the drink comes out softer and will need less syrup. Génépy works one for one too, though it is lower in proof and usually less sweet than green. Bénédictine or an amaro changes the drink more; use one only in a pinch.
Yellow Chartreuse
The same maker's milder liqueur: 43% against 55%, with about 320 g of sugar per liter against 240.
Génépy and other alpine herbal liqueurs
Alpine liqueur made from mountain wormwood (Artemisia): by law at least 30%, usually 35–45%.
Sugar preserves as surely as alcohol, so an opened bottle keeps for years and loses aroma quietly. Green Chartreuse is the exception in the category worth knowing: it goes on developing in the bottle, and old bottles are collected for that reason.
Last Word
London dry gin