Chocolatini

It was all downhill from there. Now you've got the pickletini, the appletini, the choclatini, and even—good heavens—the bacontini. As different types of alcohol were used in place of gin, that began to shift the name too. In addition to the vodkatini, there's the sakitini, the whiskitini (more commonly known as a smokey martini, but I'm on a roll, here), and the taqini. If you substitute beer for the gin, you've got a mantini.

Source: wiktionary

Today so many almost ridiculous versions of this drink exist that some drink menus actually have a special martini page. Varieties include the appletini, hazeltini, cherry martini, Cajun martini, habanero martini, pometini, chocolatini, and even a bacontini! Lest it be buried forever in this avalanche of new "exoticatinis," here is a classic recipe from a very old bartender's manual.

Source: wiktionary