Mercado de Tlacolula, Oaxaca
Tejate is a drink made from maize and cacao. It remains very popular among the indigenous Mixtec and Zapotec peoples in rural areas of Oaxaca. Principal ingredients include toasted maize, fermented cacao beans, toasted mamey pits (pixtle) and flor de cacao (also known as rosita de cacao). These are finely ground into a paste. The paste is mixed with water, usually by hand, and when it is ready, the flor de cacao rises to the top to form a pasty foam. It is served cold as-is or with some sugar syrup to sweeten it.
text description from Wikipedia