Large Soft Tortillas

Oaxaca is known for outsize tortillas—big enough to be knights’ shields. There is a very fine, soft kind and a hardy, dense kind. The former are called blandas and, though they can be made from different-colored strains of corn, are especially famous in a white version. In Oaxaca they are commonly 12 or even 15 inches in diameter, a size impractical for home cooks here to duplicate. The beautiful quality of the local corn masa is also impossible to recapture here. However, I a