Evidence of cacao use in the Prehispanic American Southwest

TLDR

Pueblo Bonito, the largest site in Chaco Canyon with roughly 800 rooms, functioned as a regional hub for interconnected towns across northwestern New Mexico. Chemical analyses of ceramic vessel residues from Pueblo Bonito reveal theobromine, indicating cacao use in cylinder jars that suggest ritual practices linked to Mesoamerican traditions and marking the first known cacao consumption north of the Mexican border between 1000–1125 CE.

Abstract

Chemical analyses of organic residues in fragments of ceramic vessels from Pueblo Bonito in Chaco Canyon, New Mexico, reveal theobromine, a biomarker for cacao. With an estimated 800 rooms, Pueblo Bonito is the largest archaeological site in Chaco Canyon and was the center of a large number of interconnected towns and villages spread over northwestern New Mexico. The cacao residues come from pieces of vessels that are likely cylinder jars, special containers occurring almost solely at Pueblo Bonito and deposited in caches at the site. This first known use of cacao drinks north of the Mexican border indicates exchange with cacao cultivators in Mesoamerica in a time frame of about A.D. 1000-1125. The association of cylinder jars and cacao beverages suggests that the Chacoan ritual involving the drinking of cacao was tied to Mesoamerican rituals incorporating cylindrical vases and cacao. The importance of Pueblo Bonito within the Chacoan world likely lies in part with the integration of Mesoamerican ritual, including critical culinary ingredients.