Traditionally made with equal parts gin, Green Chartreuse, maraschino liqueur, and lime juice, but like many others (when using a 40%-43% alc./vol. gin)...
Just outstanding. For what it's worth, I'm getting low on Green Chartreuse so did a back to back comparison of one with Chartreuse and one with Génépy le Chamois. Bombay Dry 43 and Luxardo in both. You maybe lose a little complexity with the Génépy but both were lovely.