8. It doesn’t have American cheese, Provolone or Cheez Whiz
Whiz didn’t show up on the culinary scene until the 1950s, but it’s solidified itself as a solid option in any authentic cheesesteak. Whatever your dairy choice, the melty melding of meat and cheese is key for authenticity... but that's not to say there aren't some cheese choices that are just not acceptable.
9. It has Swiss cheese
Plenty of places try to pull off this move, and it makes the fellas at Tony Luke's cry. And by "cry" we mean "willing to send over some nice gentleman to the offending restaurant for a word with the chef".
10. It’s something other than a sandwich
We shouldn’t have to say this, but just in case: These days cheesesteak has become a flavor, not just a delicious sandwich. You’ll find cheesesteak pizza, cheesesteak potato chips, cheesesteak pasta mixes & even cheesesteak flavored vodka, sausage, dog bones, and soup. Do yourself (and Tony Luke’s heart) a favor and stick with the sandwich.