Cabeza– People often mistake tacos featuring “cabeza” to mean “brain” but that is not correct. In Mexican cuisine, cabeza (literally ‘head’) includes all the meaty bits from the head of an animal, served in tacos or burritos. Patrons may request a mix or particular parts such as ojo (eye), oreja (ear), cachete (cheek), lengua (tongue), or labios (lips). If you specifically want the brain (a delicious choice), ask for seso.
Read more about the allure of cabeza here.