Masa harina is a type of corn flour used in Mexican and Latin American cooking to make the dough for tortillas, tamales and pupusas.

Masa, which means "dough" in Spanish, is made from dried corn kernels that are cooked and soaked in limewater and then ground. Masa harina is the dried and powdered version of masa that is then turned back into dough by adding water. It is not the same thing as regular corn meal or corn flour and should not be substituted.