 For example, one such vessel found at an Olmec archaeological site on the Gulf Coast of Veracruz, Mexico dates chocolate's preparation by pre-Olmec peoples as early as 1750 BC.On the Pacific coast of Chiapas, Mexico, a Mokayanan archaeological site provides evidence of cacao beverages dating even earlier, to 1900 BC.Pueblo people, who lived in an area that is now the U.S. Southwest, imported cacao from Mesoamerican cultures in southern Mexico between 900 and 1400.