What Costra means
Costra is a Mexican antojito name of Spanish origin meaning "crust". It comes from Spanish costra (crust, scab). It is pronounced KOS-trah, and it is most associated with Mexico City.
The crust is a disc of cheese griddled until it hardens and takes the tortilla's place.
This is a site about what Mexican words mean, so there is no recipe here. For the name itself: Antojito means "little craving". These are the masa-based street foods named for their shape more often than their filling: a sope is a small mound, a huarache is a sandal, a gordita is a fat little one, a tlacoyo is an oval patty.
