I love Golden Moon - a Colorado distillery that opened in 2008 and utilized old world production methods from the get-go. I am a particular fan of their Creme de Violette - an usually rich, leathery violet liquer - but this is their difficult-to-source Amer Dit Picon. Picon, of course, is the French term for an orange-flavored liqueur. Usually made with orange peel, chinchona bark, and gentian root, it's a staple of the amaro scene.
