Sookie brings the Gilmore girls some tacos and burritos for dinner, which are both popular traditional Mexican dishes. Unusually for Sookie, she seems to have bought them (maybe from Al’s Pancake World or the anonymous take-out window place?) rather than making something herself.
A taco is a corn or wheat tortilla (flatbread) folded or rolled around the filling; in the US, they are often made commercially as a hard corn shell. A burrito is a wheat tortilla which is wrapped around the filling into a cylinder shape. Sookie got extra hot sauce, so the Gilmores must like their food spicy – as the fiesta burger demonstrated.