Fast forward to the 21st century and bartenders like Jeffrey Morgenthaler have re-invented the Amaretto Sour by removing the sour mix and adding extra ingredients like bourbon and egg white.

That would be bourbon. When bourbon -- no, it's not necessarily the same as whiskey -- is added to an amaretto sour, it helps to mellow out the sweet amaretto and the sour lemon for a perfectly ...

Amaretto's comeback is not just about nostalgia, but reinvention. See which Atlanta bars and restaurants are helping rediscover the liqueur.