I'm out of Texas: Here are a few things I can think of.....
Kolaches - Originally derived from Czech, we have certainly changed things up - but plenty of people hear the word Kolache and say "What's that?" so I figured it was worth a mention
Tex Mex / Mexican food... All the same shit, revolves around the same shit of Rice/Beans. It's gotten so boring that I haven't gone to a mexican resuarant in like.. 5 years.
BBQ - No doubt, Texas is known for the best BBQ Brisket, Sausage, etc.. in the world. Lockhart, TX is a staple for learning what real BBQ is all about
Beef Jerky / Dried sausage - Similar to above.
that's all I can think of at the moment.