During the extraction of a cup of coffee, and therefore also in an espresso, hot water extracts chemicals from the coffee pod, which produces a complex mix of many chemical substances in the cup. This large presence of aromatic chemical compounds is what determines the aromatic complexity in the cup.

The Coffee Flavour Wheel is an aromatic map in the form of a wheel that helps make sense of the sensory perception of the aromas, so it’s a great way to get as much information as possible out of the aromatic notes present in a cup of coffee.