This recipe, which includes a splash of orange bitters, is adapted from the version in George Kappeler's 1895 Modern American Drinks. It was originally made with Old Tom gin, a sweetened gin unlike the London dry gin in the present-day martini.
The original martini, allegedly invented in the U.S. in the 1860s, was made with sweet vermouth. One of the first recipes for a dry martini, made with dry vermouth, appeared in Frank P. Newman's 1904 American Bar.
"This is like a really fine chocolate truffle that melts in your mouth," says bartender Marvin Allen. He makes this variation on a chocolate martini with nocino, a walnut liqueur produced in Modena, Italy.
Naren Young created this martini variation after tasting a lemon-and-basil sorbet at a restaurant. Sweet white vermouth emphasizes the basil's herbal quality, while limoncello and lemon juice give the drink a double-citrus punch.