10/15/2026
Coffee starts its journey not as a brown bean, but as a small, bright red fruit called a coffee cherry. These cherries grow on coffee plants, and each one usually contains two seeds that eventually become the coffee beans we roast and brew.
The outermost part of the cherry is the skin, which protects everything inside. Beneath the skin is the soft fruit pulp. This layer contains natural sugars and other compounds that can influence the flavor of the coffee.
Under the pulp is a sticky layer called mucilage. It surrounds the seeds and contains sugars, which can play an important role during coffee processing and fermentation. The amount of mucilage left on the beans depends on the processing method used by producers.
Next comes the parchment layer, a thin but firm protective covering around the seed. It helps protect the developing coffee bean as it grows inside the fruit. During processing, the parchment is eventually removed.
Closer to the bean is an extremely thin layer called the silver skin. It remains attached to the coffee seed and is usually removed or reduced during roasting. Small amounts may still remain on roasted beans.
At the very center is the coffee seed, commonly called the coffee bean. Technically, it is a seed rather than a true bean. Most coffee cherries contain two seeds facing each other, although some cherries develop only one rounded seed, known as a peaberry.
Once the cherries are harvested, the seeds go through processing, drying and preparation before roasting. During roasting, heat causes major chemical changes inside the beans, creating many of the aromas, flavors and colors associated with coffee.
Finally, the roasted beans are ground and mixed with hot water during brewing. This extracts soluble compounds and aromatic oils from the coffee grounds, producing the drink we know.
So, every cup of coffee begins with a fruit and passes through several protective layers before its seed becomes the familiar roasted coffee bean.
