Coffee Processing Methods Explained: How Your Beans Are Made

Coffee processing methods are one of the most significant, and most overlooked, factors in determining how your coffee tastes. You might spend time choosing the right origin, the right roast level, or the right brewing method, but the decisions made at the farm, long before the beans reach a roastery like ours, shape the flavour just as profoundly. Understanding how coffee is processed gives you a genuine edge as a coffee drinker, and it makes choosing your next bag a great deal more interesting.

In this guide, we break down the main coffee processing methods, including washed, natural, honey, and anaerobic fermentation, explain what happens at each stage, and show you how those choices translate directly into the flavour in your cup. We will also point you towards some of our single origin coffees so you can taste the difference for yourself.

What Is Coffee Processing?

Before a coffee bean can be roasted, it has to be extracted from the coffee cherry. The coffee cherry is a small fruit, roughly the size of a grape, and the bean we roast and brew is actually the seed inside. Processing is the method used to remove the fruit layers surrounding that seed, and it has a direct and measurable impact on the final flavour of the coffee.

The main layers of a coffee cherry, from outside to inside, are:

• The skin (exocarp) - the outer red or yellow fruit skin
• The pulp (mesocarp) - the fleshy fruit layer beneath the skin
• The mucilage - a sticky, sugar-rich layer that clings to the parchment
• The parchment (endocarp) - a papery protective layer around the bean
• The silver skin (spermoderm) - a thin membrane directly on the bean
• The green coffee bean - the seed itself

Different processing methods remove these layers in different ways and at different stages, and it is this variation that creates such a wide spectrum of flavour across coffees from the same country, or even the same farm.

The Washed Process: Clean, Bright, and Precise

The washed process, also known as the wet process, is the most widely used method in specialty coffee. It is particularly common in East Africa and Central America, two regions that produce some of the world's most celebrated coffees.

How the Washed Process Works

After harvesting, the coffee cherries are pulped, meaning the skin and most of the pulp are removed mechanically. The beans, still coated in mucilage, are then submerged in water tanks and left to ferment for anywhere between 12 and 72 hours. During fermentation, naturally occurring microorganisms break down the remaining mucilage. The beans are then thoroughly washed with clean water and moved to raised drying beds, where they dry in the sun for one to three weeks.

What Does Washed Coffee Taste Like?

Because the fruit is removed early in the process, washed coffees tend to express the intrinsic character of the bean and its terroir with great clarity. You can expect:

• Clean, transparent flavour with little interference from fruit fermentation
• Bright, pronounced acidity
• Lighter body compared to natural coffees
• Floral, citrus, and tea-like notes depending on origin

Our Ethiopia Number 8 and Kenya Number 2 are excellent examples of what washed processing can achieve. Both are medium roasted to preserve the origin character, and both reward careful brewing with a filter or AeroPress.

The Natural Process: Fruit-Forward and Full-Bodied

The natural process, sometimes called the dry process, is the oldest method of processing coffee. It originated in Ethiopia and Yemen, where water was scarce and drying the whole cherry in the sun was the most practical approach. Today it is used across Ethiopia, Brazil, and increasingly in other producing countries as specialty roasters seek out its distinctive flavour profile.

How the Natural Process Works

In natural processing, the whole cherry is placed directly onto raised drying beds or patios immediately after harvest, with no pulping or washing. The cherries dry in the sun for three to six weeks, sometimes longer, while the fruit slowly desiccates around the bean. Workers turn the cherries regularly to ensure even drying and prevent mould. Once the cherries reach the correct moisture level, the dried fruit is removed by a hulling machine, revealing the green bean inside.

What Does Natural Coffee Taste Like?

Because the bean spends weeks in contact with the fruit, it absorbs sugars and fermentation compounds that produce a dramatically different flavour profile to washed coffees:

• Heavy, syrupy body
• Intense fruit notes, often blueberry, strawberry, or tropical fruit
• Lower perceived acidity than washed coffees
• Natural sweetness with wine-like or fermented undertones

Our Brazil Number 13 and Brazil Number 22 are both naturally processed and showcase the rich, chocolatey sweetness that Brazilian naturals are known for. If you prefer a fuller-bodied cup with less brightness, a natural processed coffee is likely to suit your palate.

The Honey Process: The Best of Both Worlds

The honey process sits between washed and natural, and it is one of the most nuanced and labour-intensive methods in specialty coffee. Despite the name, no honey is involved. The term refers to the sticky, honey-like appearance of the mucilage left on the bean during drying.

How the Honey Process Works

In honey processing, the skin and pulp are removed mechanically, as with the washed process, but the mucilage is left on the bean in varying amounts before it is moved to drying beds. The amount of mucilage retained determines the colour classification of the honey process:

• Yellow honey - minimal mucilage retained; dries quickly; cleaner cup
• Red honey - moderate mucilage retained; longer drying time; more sweetness
• Black honey - maximum mucilage retained; slowest drying; closest to natural in flavour

What Does Honey Processed Coffee Taste Like?

Honey processed coffees offer a middle ground that many coffee drinkers find immediately appealing:

• Balanced sweetness without the intensity of a natural
• Moderate body, fuller than washed but lighter than natural
• Stone fruit notes such as peach, apricot, or plum
• Smooth, rounded acidity

This method is particularly popular in Costa Rica and El Salvador, and it is gaining traction across Central America as producers look to differentiate their lots in a competitive specialty market.

Anaerobic Fermentation: The Experimental End of the Spectrum

Anaerobic fermentation is a relatively recent development in specialty coffee processing, and it has generated considerable excitement, and some debate, within the industry. The term anaerobic simply means without oxygen, and it refers to a controlled fermentation environment that produces highly distinctive and often polarising flavour results.

How Anaerobic Fermentation Works

Whole cherries or depulped beans are placed into sealed, airtight tanks. As fermentation begins, carbon dioxide is produced and expelled through a one-way valve, preventing oxygen from entering. This oxygen-free environment encourages specific microbial activity that generates unusual flavour compounds not typically found in conventionally processed coffees. Fermentation times vary from 24 hours to several days, and producers can influence the outcome by controlling temperature, pressure, and the introduction of specific yeast strains.

What Does Anaerobically Fermented Coffee Taste Like?

Anaerobic coffees are not for the faint-hearted. They tend to be intensely aromatic and flavour-forward, often described as:

• Tropical fruit, passion fruit, or pineapple
• Fermented or wine-like complexity
• Unusual savoury or spiced notes in some lots
• Very heavy body with lingering sweetness

For those who enjoy exploring the outer edges of what coffee can taste like, anaerobic lots are genuinely fascinating. For those who prefer a more traditional cup, they can occasionally feel overwhelming. As with all things in specialty coffee, it comes down to personal preference.

Frequently Asked Questions About Coffee Processing

What is the difference between washed and natural coffee?

Washed coffee has the fruit removed before drying, producing a clean, bright, and acidic cup. Natural coffee is dried with the fruit intact, resulting in a sweeter, fruitier, and fuller-bodied cup.

What is honey processed coffee?

Honey processed coffee sits between washed and natural. The skin is removed but some or all of the mucilage is left on the bean during drying, producing a balanced cup with sweetness and moderate acidity.

Does coffee processing affect caffeine content?

Processing method has a negligible effect on caffeine content. Caffeine levels are primarily determined by the coffee species and variety, not how the cherry is processed.

Which coffee processing method produces the best flavour?

There is no single best method. Washed coffees tend to be cleaner and brighter; natural coffees are fruitier and sweeter; honey processed coffees offer a balance of both. The best method depends entirely on your personal taste preferences.

How to Choose a Coffee Based on Processing Method

If you are new to thinking about processing methods, a simple starting point is to consider what you already enjoy in your cup and work backwards from there.

• You prefer a clean, bright, and complex cup - start with a washed coffee. Our Kenya Number 2 or Colombia Number 19 are excellent starting points.
• You prefer a sweet, fruity, and full-bodied cup - try a natural. Our Brazil Number 13 is a reliable and approachable natural with rich chocolate and nut notes.
• You want something in between - look for a honey processed coffee, or try one of our Signature Collection blends, which are crafted to balance sweetness and clarity.
• You want to push the boundaries - seek out an anaerobic lot and approach it with an open mind and a filter brewer.

If you are unsure where to start, our Variety Bundle gives you three distinct single origins, including Ethiopia, Brazil, and Nicaragua, so you can compare flavour profiles side by side and find your preference without committing to a single bag.

Processing Methods and Sustainability

Processing method is not just a flavour consideration. It also has significant implications for water use, waste management, and environmental impact at origin.

The washed process is water-intensive. Traditional wet mills can use thousands of litres of water per tonne of coffee, and the wastewater, known as coffee effluent or pulping water, can be harmful to local waterways if not managed responsibly. Many progressive producers now use eco-pulpers that dramatically reduce water consumption, and some have moved to closed-loop systems that recycle and treat wastewater on site.

The natural process, by contrast, uses very little water, which is one reason it developed in arid regions. However, it requires significant land for drying beds and careful management to prevent mould and inconsistency, particularly in humid climates.

At Scorgo, we source from importers who prioritise traceability and ethical producer relationships. Understanding processing methods is part of understanding the full journey of your coffee, from the farm to your cup, and we think that matters.

The Bottom Line

Coffee processing methods are not a minor technical detail. They are one of the primary levers that producers use to shape flavour, and understanding them makes you a more informed, more curious, and frankly more satisfied coffee drinker. Whether you gravitate towards the precision of a washed Ethiopian, the exuberance of a natural Brazilian, or the balance of a honey processed Central American, there is a world of flavour waiting to be explored.

The best way to understand processing is to taste it. Pick two coffees processed differently, brew them the same way, and compare. You will be surprised how much difference a single decision made on a farm thousands of miles away can make in your cup.