How Are Raw Coffee Beans Processed? Coffee Bean Processing Methods and What Is Coffee Red Wine Processing?

Coffee Processing Methods

Once coffee has been planted and harvested, the next step is processing. For a long time natural and washed processing dominated, and then honey processing became popular, later subdivided by how much mucilage is left on the bean: black honey, red honey, yellow honey and white honey, each with its own flavor profile.

There are also "wine-flavored natural" methods that extend fermentation to push the cup toward a wine-like character, and "wine honey processing," which adds enzymes similar to those used in red wine fermentation to achieve a honey-processed flavor.

The "anaerobic fermentation method" uses hand-picked, 100% ripe cherries with an average fermentation time of about 24 hours. This processing approach rests on four main elements:

1. Shade System

Shade blocks sunlight effectively, allowing the pulp to generate more sugar, which gives the coffee more sweetness and a wonderful acidity.

2. Stainless Steel Containers

The beans go into stainless steel containers immediately after picking, leaving behind traditional cement and other vessels. Those older containers absorb coffee flavors rather than holding more of them in the pulp, whereas stainless steel keeps the cup cleaner.

3. Carbon Dioxide

The beans in the stainless steel containers are sealed and pressurized with carbon dioxide so that no air remains inside. This guarantees that the coffee's flavors and aromas stay in the bean, making the original character more pronounced.

4. Controlled Temperature

These beans are processed in temperature-controlled environments, which gives them consistent flavor. Traditional methods struggle to keep batch after batch consistent.

FrontStreet Coffee's Panama Hartmann is processed this way. The wine processing gives these beans a rich fermented wine aroma that is truly stunning.

FrontStreet Coffee Pour-Over Recommendations

V60 / 90°C / 1:15 / Time: two minutes

Flavor Profile

Grapefruit, low acidity, rich fermented wine aroma

FrontStreet Coffee Recommendation

Honey processing is one of the clearest examples of how much the process shapes the cup, and FrontStreet Coffee's lineup shows the range it can cover. FrontStreet Costa Rica Blackberry takes the deepest version of the method: a black honey process that removes almost no mucilage, dries far more slowly — at least two weeks — under shade cloth to keep the sun from drying it too fast, and is turned at intervals so the sugars convert evenly without over-fermenting. It asks more of the producer than almost any other honey style. Roasted medium-light, it opens with an intense floral aroma in the grounds and drinks with grape, berry and ripe blackberry notes.

For a lighter, fruitier take, FrontStreet Strawberry Candy blends Panama Gesha with a Costa Rican raisin honey process — a method that keeps 100% of the mucilage with zero water use. The cherries are floated on the harvest day, so ripe, full fruit sinks while underdeveloped or overripe fruit rises and is skimmed off; the selected cherries then dry on raised beds for at least three days before the skin is removed, the mucilage is left intact, and drying continues with constant turning for evenness. The result holds the Gesha's floral, tea-like lift alongside raisin and dried blueberry, a soft fruit acidity, an almond finish and clear sweetness. FrontStreet Costa Rica Mozart also comes from the more experimental raisin honey route, offering an osmanthus, pineapple and raisin aroma that works in pour-over, cold brew and moka pot alike.