Coffee Cherry

The coffee cherry is the fruit produced by coffee plants (genus Coffea), and the seed inside it is what we roast, grind, and brew as coffee. A coffee cherry is roughly the size of a cranberry or small grape, and it changes color as it ripens — typically from green to yellow to red, though some varieties ripen to yellow, orange, or pink. Each cherry usually contains two seeds (beans) facing each other with their flat sides together, enclosed in multiple protective layers.

The anatomy of a coffee cherry includes several distinct layers from outside to inside: the outer skin (exocarp), the fruit flesh or pulp (mesocarp), a sticky sugar-rich layer called mucilage, a thin protective parchment shell (endocarp), a silver skin (spermoderm), and finally the green coffee bean (seed) at the center. Each processing method — washed, natural, honey — removes these layers at different stages and retains different amounts of fruit contact during drying, which is why processing has such a dramatic impact on flavor.

Cherry ripeness at the time of picking is one of the most critical quality factors in coffee production. Ripe cherries contain peak sugar and acid levels that translate to sweetness and complexity in the cup. Unripe (green or partially yellow) cherries produce astringent, grassy, sour defects, while overripe cherries can introduce ferment and vinegar notes. Selective hand-picking — harvesting only fully ripe cherries — is the standard for specialty coffee but adds significant labor cost.

Occasionally, a cherry produces only one seed instead of two. This single, rounded seed is called a peaberry, and it is separated and sold as a distinct product by some producers. The cherry fruit itself — called cascara when dried — is also increasingly used to make a tea-like beverage or processed into cascara syrup for specialty drinks.