Even with billions of cacao beans exchanges, Aztec cacao sellers took great measures to disguise their fake cacao. According to Bernard Sahagun, a Spaniard documenting Aztec lives, cacao sellers processed fakes using hot ashes, chalk, and a generous coating of amaranth dough, wax, or avocado pits (Coe 100). To further camouflage their counterfeit cacao, sellers mixed the fake cacao with pure Theobroma cacao beans. Other cacao deception experts exploited empty shells by filling the insides with mud (De Maré).

Source

Sahagun was one of the first westerners to document the indigenous people of Mexico.