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Honey process: yellow, red, black - what the coffee colours mean

On the bag of a good speciality coffee you increasingly see the word honey, and next to it a colour: yellow, red or black. It sounds like a flavour, but it has nothing to do with honey nor with adding anything. Honey process is a method of processing the bean, lying halfway between washed and natural processing. The name comes from the sticky, tacky layer of mucilage that coats the bean like honey when it is left on during drying. And the colours - yellow, red, black - are a scale telling how much of this mucilage was left and how long the coffee dried. The more, and the longer, the sweeter and fruitier the cup. Here is a guide to honey process: where the name comes from, what the colours mean and why the same coffee can taste so different.

Where the name honey comes from

First let us deal with a misunderstanding: there is no honey in honey process. After picking, the coffee fruit, the cherry, is stripped of its skin, exposing the bean covered with mucilage - a sticky, sugary layer of pulp. It is precisely this tacky, glossy coating that feels like honey to the touch, and that is where the name came from. In washed processing the mucilage is fully washed off with water, in natural the whole cherry is left, and honey is the in-between road: the skin is removed, but part or all of the mucilage stays on the bean to dry. The sweetness in the cup therefore comes not from honey but from the chemistry of fermentation that happens in this mucilage during drying. Understanding that honey is simply left-on mucilage is the key to all the rest. We cover the methods more in coffee processing.

A place between washed and natural

Honey process is best understood as a bridge between two poles. Washed processing removes all the mucilage, giving a clean, clear and acidic coffee, where the variety and the terroir speak. Natural processing leaves the whole cherry, giving a very fruity, sweet and heavy coffee, sometimes downright winey. Honey lies in between: it leaves part of the mucilage, so it takes a little from both worlds - the cleanness of washed and the sweetness of natural. This is why honey coffees are often described as sweeter and more full-bodied than washed, but cleaner and more balanced than naturals. This position in the middle is not a compromise of necessity but a deliberate choice of profile. We cover the poles more in washed processing and natural.

What the colours mean

The honey colours - yellow, red, black (sometimes also white) - are a scale telling how much mucilage was left on the bean and how it dried. It is not the colour of the brew nor the variety, but conventional names of levels. The less mucilage and the faster the drying in the sun, the lighter the colour and the cleaner the cup. The more mucilage and the slower, more shaded the drying, the darker the colour and the deeper, fruitier the sweetness. The colour of the bean during drying really does darken with the amount of mucilage, hence the names. It is a simple, intuitive scale: yellow is the lightest end, black the heaviest, and red in the middle. Understanding this axis - less mucilage, cleaner; more mucilage, sweeter - lets you read labels and predict flavour.

A table: three honey levels

Let us gather the three main levels in one place:

The table shows the heart of it: the amount of mucilage and the drying time grow together, and with them the sweetness and fruitiness. Yellow is closest to washed, black closest to natural.

Yellow honey

Yellow honey is the lightest end of the scale. About a quarter of the mucilage is left on the bean, and the coffee is dried fast, in full sun, often turned to speed up drying. The short drying time means less fermentation, so the cup stays relatively clean. In flavour it is a coffee of a clear base, but with noticeably more sweetness and body than washed - with notes of mild caramel, honeyed sweetness and gentle stone fruit, like peach or apricot. It is a good choice for someone who likes the cleanness of washed but wants a touch more sweetness and body. Yellow honey is the safest, most balanced of the three - a gentle entry into the world of honey processing.

Red honey

Red honey is the golden middle of the scale. About half the mucilage stays on the bean, and the coffee is dried more slowly, in partial shade - under a roof, a tarp or on overcast days. Slower drying means more time, and so more fermentation, more breakdown of sugars and a deeper development of flavour. The result is a coffee clearly sweeter and fruitier than yellow honey, with a fuller body, but still with kept balance and a readable acidity. Red honey often combines the best of both: sweetness and fruit without the overwhelming heaviness of natural. For many it is the model honey - sweet and complex enough to delight, and clean enough to stay elegant. Hence its popularity among speciality producers.

Black honey

Black honey is the heaviest and most labour-intensive end of the scale. 75 to 100 percent of the mucilage is left, almost as in natural processing, and the coffee is dried very slowly, in deep shade, turned rarely. The drying time can double compared with the lighter levels. This long, slow drying gives the most fermentation, and so the deepest sweetness and an intense, fruity profile with a soft, gentle acidity and rich aromatics. Black honey is closest to natural processing, but often cleaner and more controlled. It demands enormous attention, though: with so much sugar and moisture it is easy to get a faulty fermentation or mould, so the producer must watch the drying like a hawk. This is why a good black honey is rare and prized.

Why drying time is key

Across all the honey levels one variable decides: how long the drying takes. The more mucilage on the bean, the slower the coffee dries, because the sticky layer holds moisture. And the longer the drying, the more fermentation happens in this mucilage - it is fermentation that breaks down the sugars and builds the fruity, sweet notes we then sense in the cup. This is why the producer steers the flavour precisely through the amount of mucilage left and the pace of drying: turning the coffee more often and drying it in the sun gives a cleaner profile; leaving more mucilage and drying in the shade gives a deeper and sweeter one. This shows that honey is not one flavour but a whole scale, precisely steered by time and mucilage.

How to sense it in the cup

You will often recognise a honey coffee by a characteristic combination: a clear sweetness and a round body while keeping cleanness. Unlike washed it is sweeter and more full-bodied, and unlike natural it is less wild and winey, more elegant. Yellow honey will be the cleanest, with a gentle sweetness and stone fruit; red fuller and clearly fruity; black the deepest, almost syrupy sweet, with a soft acidity. If you sense a honeyed-caramel sweetness and a smooth body, but without excessive wildness, that is a good clue that it is honey. It is worth brewing the same coffee side by side in a washed and a honey version, to feel how much the left-on mucilage brings. Over time you will start to recognise the honey levels by the very sweetness and cleanness.

The essentials in brief

Let us gather it up. Honey process has nothing to do with honey - the name comes from the sticky layer of mucilage left on the bean during drying. It is a method in between washed and natural processing. The colours - yellow, red, black - are a scale telling how much mucilage was left and how long the coffee dried: yellow is little mucilage and fast sun drying (clean, light sweetness), black is much mucilage and slow shaded drying (deep sweetness, fruit). Red lies in the middle. The key is the drying time, because it decides how much fermentation builds the sweetness. Now you know what the colours on the bag mean and where honey gets its characteristic sweetness.

Note every coffee in GustoNote - including the processing and the honey level. Over time you will start to recognise the sweetness of yellow, red and black honey, and understand more deeply how the mucilage shapes flavour.