Maseca is actually the brand name for a very common type of dried corn flour used as the base of corn tortillas.  &quot;Seca&quot; means dry, and when you add water to the maseca, you get &quot;masa&quot; which means dough.  Once you have added water and hence created masa, you can begin pressing the tortilla.  It can be that easy.  We just like to add in few additional grains for added nutrition.  I&#39;m willing to bet that you can find Maseca at most large grocery stores.  If not, all Latin groceries should carry it.  It is sold in 4.4 pound sacks similar to wheat flour.  For more info, go to www.mimaseca.com