Key Takeaways

• Co-fermented coffee is coffee that’s fermented with additional natural ingredients, such as fruit, spices, yeast, or other fermentation cultures during processing, to influence final flavour.
• All coffee undergoes fermentation during processing, but co-fermentation introduces additional ingredients with the coffee cherry.
• Co-fermented coffees can have bold flavour profiles, including more intense notes of tropical fruit, berries, florals, and confectionary sweetness.
• The process is not the same as adding artificial flavours to coffee after roasting. Instead, flavour develops during processing at the farm.
• Supporters of co-fermentation see it as an exciting way to explore flavour. Critics argue it can blur the line between processing and flavouring.
• Quality depends entirely on the skill of the grower. Thoughtful co-fermentation requires careful control, consistency, and transparency.

Every coffee tells a story. It starts on a farm, often thousands of miles away, where growers nurture coffee cherries through changing seasons, careful harvesting, and years of knowledge passed down through generations. Then comes processing: the moment when those cherries are shaped into the flavours you’ll eventually discover in your cup.

Co-fermented coffee is one of the newest chapters in that story.

It’s a process that’s creating coffees with bold, surprising flavours – from tropical fruit and florals to wine-like sweetness – while also sparking plenty of conversation across the coffee world.

So, what exactly is co-fermented coffee? Why are growers experimenting with it? And what does it mean for your morning brew?

Here’s everything you need to know.

What is a co-fermented coffee?

A co-fermented coffee’s a coffee that’s been fermented with another natural ingredient to influence its flavour.

During this process, coffee cherries are placed in fermentation tanks with ingredients such as:

• Tropical fruits.
• Fruit pulp.
• Herbs and spices.
• Selected yeast strains.
• Natural microbial cultures.

The fermentation process allows these ingredients to interact with the coffee, creating new flavour compounds that can change the way the final coffee tastes.

Imagine a coffee grown high in the mountains of Colombia, where cool nights slow the ripening of the coffee cherries, and bright sunshine helps develop sweetness. During processing, the grower carefully ferments those cherries with fresh mango or passionfruit. The result might be a cup with flavours that remind you of tropical fruit, while still carrying the character of the farm where it was grown.

The Speciality Coffee Association says the length of fermentation has a ‘significant impact on the quality of coffee’.

What is a co-ferment coffee?

Co-ferment coffee is another way of saying co-fermented coffee.

Both terms describe the same process – coffee that’s been fermented with additional natural ingredients to create a unique flavour profile. 

You’ll see both terms used across the speciality coffee industry, although ‘co-fermented coffee’ is the more common phrase.

How is co-fermented coffee different from fermented coffee?

All coffee is fermented.

But before coffee reaches your kitchen, the beans inside coffee cherries go through a process. Microorganisms naturally break down the sugars in the sticky fruit layer surrounding the bean, helping develop sweetness, acidity, and aroma.

Traditional coffee processing methods include:

• Washed.
• Natural.
• Pulped natural.
• Honey.
• Anaerobic.

With these methods, growers carefully control fermentation using the coffee cherry itself. In some cases, they’ll extend the fermentation process. It’s a high-risk process, but, if performed successfully, it’ll bring out deeper, more complex flavours.

Co-fermentation takes another step by introducing additional ingredients into that process.

Think of it like cooking.

A naturally processed coffee might allow the sweetness of the coffee cherry to shine through – like tasting a perfectly ripe piece of fruit straight from the tree.

But if a grower wants to dial up the flavour profile, they might co-ferment the coffee cherry with a different fruit, yeast, or spice to create a completely new experience – essentially influencing their process to intentionally create very specific flavours.

Neither approach is better. They just create different journeys from farm to cup. You can learn more about different processing methods in our guide here.

Why do growers create co-fermented coffees?

Co-fermentation is about curiosity and creativity.

Coffee growers have always experimented. They adapt to their landscapes, climates, and communities to bring out the best in their harvests.

For some growers, co-fermentation is a way to explore new flavours and create coffees unlike anything else.

It can help them:

• Highlight the natural sweetness already present in their coffee.
• Experiment with fermentation techniques.
• Create distinctive coffees for coffee lovers looking for something unique.
• Add value to exceptional lots.

Many of these experiments are led by growers who know their land better than anyone. They understand their soil, their climate, and their coffee plants – and they’re using that knowledge to push coffee forward.

Will Corby, Pact’s Director of Coffee and Social Impact, says “putting a grower in more control of the fermentation process and generating a more consistent output is going to generate more value for them in the long term and de-risk the process of producing coffee.”

What does co-fermented coffee taste like?

One of the reasons co-fermented coffees create such a buzz is their flavour.

These coffees can be incredibly expressive, with tasting notes such as:

• Juicy mango.
• Strawberry jam.
• Passionfruit.
• Peach sweets.
• Floral honey.
• Red berries.
• Tropical fruit.
• Dark chocolate.

Now, you may be thinking, “I already see non-fermented coffees with these tasting notes, so what’s the big deal?”

If a non co-fermented coffee has notes of juicy mango – while it might well taste like that – these notes are more of a guide and are open to your own interpretation. With a co-fermented coffee, that juicy mango note will be a lot more noticeable, almost unmistakable.

Tasting these coffees can feel like discovering coffee all over again. Your morning brew might taste less like what you’d expect from coffee and more like a fruity dessert wine or a summer fruit bowl.

Of course, flavour still depends on the coffee itself: the variety of the plant. The farm’s altitude, the climate, and the grower’s skill all play a part.

Is co-fermented coffee flavoured coffee?

No. Flavoured coffee typically means flavourings are added after roasting, such as syrups or artificial flavour compounds,

Co-fermented coffee’s different because the flavour develops during processing, under the control of the grower, while the coffee’s still at the farm.

But, because growers introduce added ingredients during fermentation, some people debate whether co-fermentation moves away from traditional coffee processing.

This conversation’s important.

Coffee lovers deserve to know how their coffee was made – who grew it and what went into creating the flavours they experience – because the more you know about your coffee, the more meaningful your morning coffee becomes.

Is co-fermented coffee speciality coffee?

It can be.

Many co-fermented coffees are made by skilled speciality coffee growers using carefully selected, high-quality arabica coffee cherries.

But, like any processing method, the result depends on how it’s done.

A great co-fermented coffee still starts with great coffee. The variety needs to be exceptional. The farm needs the right conditions. The grower needs knowledge and care for the coffee.

Processing can elevate coffee’s potential – but it can’t replace it.

As Will Corby says – who has over 20 years of experience in speciality coffee: “I’m all for embracing it, so long as we’re not going too crazy and overpowering or covering up the wonderful characteristics that exist within coffee because of terroir.”

How to choose a great co-fermented coffee

The best way to explore co-fermented coffee is to look for transparency.

A good roaster should tell you:

• Who grew the coffee.
• Where it was grown.
• How it was processed.
• Which ingredients were used
• Why the grower chose that method.

Behind every cup – ever flavour – is a string of people making decisions.

A grower making decisions in their fields and during fermentation. A roaster deciding the perfect way to bring those flavours to life. And a barista / home coffee drinker deciding how they want to brew that coffee.

FAQs

Is co-fermented coffee artificially flavoured?

No. Co-fermented coffee develops flavour naturally during fermentation at the farm, rather than having flavourings added after roasting.

Is all fermented coffee co-fermented?

No. All coffee goes through some level of fermentation during processing, but co-fermented coffee includes added ingredients during that process.

What ingredients are used in co-fermented coffee?

Growers may use fruits, spices, herbs, yeast strains, or other natural ingredients.

Why is co-fermented coffee controversial?

Some coffee professionals see co-fermentation as an exciting innovation, while other prefer coffee processing methods that focus only on the coffee cherry itself. The important thing is transparency,

Does co-fermentation make coffee taste fruit?

It can do. Many co-fermented coffees have very noticeable fruit flavours, but the final cup also depends on the coffee variety, growing environment, and processing choices,

Is co-fermented coffee better than traditional coffee?

Not necessarily. It’s simply different. The best coffee is the one that helps you enjoy your daily ritual and appreciate the people and places behind it.