MASA Spanish for dough. In the Americas it is often short for masa de maíz, a maize (corn) dough made from freshly prepared hominy. It is used for making corn tortillas, tamales, pupusas, arepas and many other Latin American dishes. The dried and powdered form is called masa harina, masa de harina, and sometimes maseca, the name of a leading commercial brand. It is reconstituted with water before use.Masa de trigo is Spanish for wheat flour dough.