How coffee gets from a cherry to a bag

Coffee grows as a fruit. The seed inside — what gets roasted — is only worth keeping if someone removes the fruit, dries the seed, and does both before the sugars spoil.

The coffee cherry is a small fruit, usually red when ripe, with two seeds face to face. Pickers are after the seed. The fruit is in the way, and how it is removed is the first big decision about flavor. A ripe cherry and an underripe one on the same branch do not taste the same later. Harvesting only the ripe fruit is slower and costs more. Strip-picking everything at once is faster and mixes the unripe in. A lot of what a bag later calls “quality” started as that choice in a field.

Three families of processing cover most of what you will see on a label. Washed, or wet-processed, coffee is pulped, fermented so the sticky mucilage lets go, washed, and dried. The cup tends to taste cleaner, more of the seed and less of the fruit. Natural, or dry-processed, coffee is dried in the whole cherry, fruit and all, then hulled. Sugars from the fruit soak into the seed. The cup can be heavier, fruitier, and, if the drying was sloppy, fermented in the bad sense. Honey process sits between them: the skin is removed and some mucilage is left on while the seed dries. The name is about the sticky fruit, not about bees.

Drying is where a lot of coffee is won or ruined, and it is not glamorous. The seed has to come down to a moisture level low enough that it will not mold on a ship, without being baked. Raised beds, patios, and mechanical dryers are all ways of doing that. Rain on a patio of naturals is a crisis. A lot that looks fine in the evening can be a defect by morning. Defects have names — phenol, ferment, mold, potato — and graders look for them by sorting green seeds and by roasting a sample. The pretty story on a bag is downstream of someone throwing beans away.

After drying, the parchment layer is hulled off and the green coffee is graded by size, density, and defect count. Green coffee is what actually travels. It is stable enough to sit in a warehouse and to spend weeks on a ship. Roasted coffee is not. The moment you roast, the oils are more exposed, the aromatics start leaving, and the clock that matters to a drinker has started. Shipping roasted coffee around the world is usually a worse idea than shipping green and roasting near the people who will drink it. The “fresh” date you want is the roast date, not the harvest, though a tired green bean will not become a lively roast.