In Central and South America including Africa there is a unique tree which has brought forth a special kind of seed consumed for thousands of years. The tree is the Theobroma cacao which produces oval shaped pods that turn yellow, orange or red when ripe. Inside each pod are around 20 to 50 seeds called cacao seeds.
The Mayans would extract these seeds and consume it in the form of a drink. Years later when the Aztecs discovered cacao beans they used it as currency as well as to make a frothy drink similar to the one the Mayans consumed.