Sesos are brains, usually from a cow or goat, and they make a popular Mexican taco filling. Cooks and diners prize tacos de sesos for their soft, silky, almost custard-like texture, which provides a nice contrast to crunchy or fresh toppings such as onions, cilantro, and lime.

Cabeza is meat from the head of a cow and is typically served braised or steamed to enhance its tenderness (cabeza can be quite supple and rich, thanks to the high-fat content in the head).