It would also suggest that there may be ancient roots for traditional dishes eaten in today’s Mexico, such as mole, the chocolate-based sauce often served with meats.

“This is the first time it has been found on a plate used for serving food,” archaeologist Tomas Gallareta said. “It is unlikely that it was ground there (on the plate), because for that they probably used metates (grinding stones).”

The traces of chemical substances considered “markers” for chocolate were found on fragments of plates uncovered at the Paso del Macho archaeological site in Yucatan in 2001.