A cheesesteak, also known as a Philadelphia cheesesteak, Philly cheesesteak, cheesesteak American cheese, Cheez Whiz, and provolone are the most commonly used cheeses or cheese products put on to the Philly cheesesteak. Feb 1, This is the Philly cheesesteak! Geno's Steaks has been cooking up the city's signature dish since Now you can enjoy a taste of. May 23, You've read it, heard it, tasted it, savored it, seen it in photo op action: Want a " classic" or "authentic" Philly cheesesteak? Gotta go with Cheez.