Lone Star hits the fucking spot. I consider myself a connoisseur of regional cheap lagers, and for me Grain Belt and Lone Star are 1A and 1B nationally.
I don't know that jello salads and kolaches are inherently Texan. Jello salad exists anywhere poor/cheap white people exist, and kolaches are everywhere the Czechs went. I live adjacent to a super Czech community in north Iowa and kolaches are basically a form of currency there.
I always thought Texas BBQ was the most wildly overrated provincial bullshit out there, but then I went to a legit Texas BBQ joint and I realized I'd just had shitty Texas BBQ previously. The Texas method/style is absolutely my BBQ preference at this point in time. Even if I'm not cooking traditional Texas BBQ cuts, I gravitate to that general method. It is superior.
Texas's dumbest food thing is the rigor of chili. Chili is a fucking canvas. Go nuts with it. It might suck ass, but it might be divine. Following some arcane rules can be kind of a fun challenge, but acting like anything outside of that "isn't chili" is silly AF.