Fermenting cocoa beans under banana leaves creates over six hundred distinct aroma molecules

Cocoa fermentation is a biological marvel that turns bitter seeds into flavorful chocolate precursors. By piling beans under banana leaves for up to seven days, yeasts and bacteria trigger a succession of chemical reactions. As temperatures reach 50 degrees Celsius, the beans undergo acetic acid oxidation, which unlocks over 600 volatile aroma molecules like 2-phenylacetaldehyde.