In North America, a corn tortilla or just tortilla is a type of thin, unleavened flatbread, made from hominy, that is the whole kernels of maize treated with alkali to improve their nutrition in a process called nixtamalization. A simple dough made of ground, dried hominy, salt and water is then formed into flat discs and cooked on a very hot surface, generally an iron griddle called a comal.
Corn tortilla
Tacos (Chicago)
Preparation of tortillas in Nuevo León, Mexico
Tortillas of blue corn
A flour tortilla or wheat tortilla is a type of soft, thin flatbread made from finely ground wheat flour. Made with flour- and water-based dough, it is pressed and cooked, similar to corn tortillas. The simplest recipes use only flour, water, fat, and salt, but commercially-made flour tortillas generally contain chemical leavening agents such as baking powder, and other ingredients.
Flour tortilla
Tortillas being made in Old Town San Diego
A thick, American-style pea soup garnished with a tortilla sliver
Tortilla machine (Xochimilco market)