Mesoamerican mushroom stones, often found with metates and used for grinding the sacraments before use. - image: mushroomstone.com
Psilocybin containing mushroom use dates back over 7000 years throughout different cultures. Most proof has been found in Mayan and Aztec history (art, religion, excavations, texts, mythology, etc) indicating the important role they played. Even more is known about the cultural importance of cacao. And less about the combination of both.
The Aztecs called the sacred mushrooms teonanacátl (flesh of the gods). Cacao’s official name is theobroma cacao (food of the gods). Both are interesting by themselves and create a powerful combination increasing the effect. The mushroom opens the mind and cacao opens the heart.
Most information about uses and ceremonies has been destroyed, but luckily some survived. In the 16the century, Bernadino de Sahagún studies Aztec culture and describes in The Florentine Codex:
"At the very first, mushrooms had been served...They ate no more food; they only drank chocolate during the night. And they ate the mushrooms with honey. When the mushrooms took effect on them, then they danced, then they wept. But some, while still in command of their senses, entered and sat there by the house on their seats; they did no more, but only sat there nodding...And when the effects of the mushrooms had left them, they consulted amongst themselves and told one another what they had seen in their visions."
Ancient ceremonies continued in secret and many seeking them reported the combination with cacao drinks.