Thank you for the ongoing additions and corrections—I’ve updated the list accordingly.
@francois, how do you feel about adding the Media Combinación to the list? Makes sense? Is there any identifiable provenance?
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Aperol Spritz: I don’t have any great sources—mainly Wikipedia—but it seems the Aperol variant of the Spritz Veneziano has been kicking around (regional specialty) since the 1950s.
If so, that currently leaves the Appletini of the mid-90s as the most recent “essential” drink on the list. That seems a little sad and unfair, but maybe them’s the breaks? Just to be sure, what about Tommy’s Margarita, Gold Rush, Gin Gin Mule, Old Cuban, Chartreuse Swizzle, Penicillin, Oaxaca Old Fashioned, Paper Plane, Benton’s Old Fashioned, Gin Basil Smash or the Barrel Aged Negroni? They’ve certainly traveled. Perhaps it’s just too early to name any drinks from the last twenty years as essential?