A Simple Guide to Making Coffee Wine at Home

Quick answer

• Coffee wine is a fermented beverage using coffee as the base.
• You’ll need coffee, sugar, yeast, and water to start.
• Fermentation takes time, typically several weeks to months.
• Patience is key; good coffee wine isn’t rushed.
• Sanitation is crucial to prevent off-flavors.
• Taste and adjust sweetness after primary fermentation.

Who this is for

• Coffee lovers looking for a new way to enjoy their favorite bean.
• Homebrewers seeking a unique and experimental project.
• Adventurous drinkers curious about fermented coffee beverages.

What to check first

Brewer type and filter type

The brewing method impacts the initial coffee flavor. Espresso, cold brew, or a strong drip all bring different notes. Filters matter too. Paper filters can strip some oils, while metal or cloth filters let more through. For coffee wine, a stronger, more concentrated coffee base is usually better. Think cold brew or a very strong French press.

Water quality and temperature

Good water makes good coffee, and good coffee wine. Use filtered water if your tap water has a strong taste. The initial brewing temperature for your coffee base isn’t as critical as it is for drinking coffee, but aim for something that extracts well. For the fermentation itself, the yeast has an optimal temperature range. Check your yeast packet.

Grind size and coffee freshness

A coarser grind is often preferred for cold brew, which can be a good base. For other methods, a medium to fine grind works. Freshly roasted and ground coffee will give you the best flavor profile to start with. Stale coffee might result in a flat-tasting final product.

Coffee-to-water ratio

This is your starting point for flavor strength. For a coffee wine base, you’ll want a much higher coffee-to-water ratio than you would for drinking coffee. Think of it as making a concentrate. A good starting point might be 1 part coffee to 4 or 5 parts water, but this can vary wildly depending on your method and preference.

Cleanliness/descale status

This is non-negotiable. Everything that touches your coffee wine needs to be sparkling clean and sanitized. This includes carboys, airlocks, tubing, and any vessels. Buildup from old coffee oils or bacteria can ruin your batch. Descale your coffee maker if you’re using it to brew the base, but the real sanitation comes after brewing.

Step-by-step (brew workflow)

1. Brew a strong coffee concentrate.

• What to do: Use your preferred method (cold brew, strong drip, French press) to make a very concentrated coffee liquid.
• What “good” looks like: A dark, intensely flavored coffee liquid with minimal sediment.
• Common mistake: Brewing too weak. This will result in a thin, watery coffee wine. Avoid this by using more coffee grounds and less water than usual.

2. Cool the coffee concentrate.

• What to do: Let the hot coffee cool down completely to room temperature. If you made cold brew, it’s already cool.
• What “good” looks like: Coffee liquid that is no longer steaming.
• Common mistake: Adding yeast to hot liquid. This will kill the yeast before it can do its job. Wait until it’s cool to the touch.

3. Add sugar and dissolve.

• What to do: Stir in your sugar until it’s completely dissolved. The amount depends on your desired sweetness and alcohol content. Start with a good amount, maybe 1-2 lbs per gallon.
• What “good” looks like: A clear liquid with no visible sugar crystals at the bottom.
• Common mistake: Not dissolving the sugar fully. Undissolved sugar won’t be fermentable and can lead to weird flavors. Stir until it’s gone.

4. Transfer to fermenter.

• What to do: Pour the sweetened coffee mixture into a sanitized fermenting vessel (like a carboy).
• What “good” looks like: The liquid is safely in its designated brewing container.
• Common mistake: Overfilling the fermenter. Leave headspace for foam and activity during fermentation.

Pour the sweetened coffee mixture into a sanitized fermentation vessel, like a carboy, to begin the brewing process.

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5. Add yeast and nutrient (optional).

• What to do: Pitch your wine yeast (champagne yeast works well) and any yeast nutrient according to the packet instructions.
• What “good” looks like: Yeast is added and mixed in.
• Common mistake: Using bread yeast. While it can work, wine yeast is designed for higher alcohol tolerance and cleaner flavors.

6. Seal and airlock.

• What to do: Fit a sanitized airlock filled with sanitizer solution or vodka to the fermenter.
• What “good” looks like: A secure seal that allows CO2 to escape but keeps oxygen out.
• Common mistake: Leaving it open or not sealing properly. This lets in oxygen and unwanted bacteria, leading to spoilage.

7. Ferment (primary).

• What to do: Store the fermenter in a dark place at the recommended yeast temperature (usually 65-75°F). Let it ferment until bubbling slows significantly (1-3 weeks).
• What “good” looks like: Active bubbling in the airlock, then slowing down to an occasional bubble.
• Common mistake: Moving it too much or checking it constantly. Let the yeast do its work undisturbed.

8. Rack to secondary fermenter.

• What to do: Carefully siphon the liquid off the sediment (lees) into a clean, sanitized secondary fermenter.
• What “good” looks like: Clearer liquid transferred, leaving the dead yeast and solids behind.
• Common mistake: Disturbing the lees too much. This can stir up sediment and make your wine cloudy. Use a siphon gently.

9. Age.

• What to do: Let the coffee wine continue to ferment and clear in the secondary fermenter for several weeks to months.
• What “good” looks like: The wine becomes clearer and the flavors meld.
• Common mistake: Bottling too early. Aging mellows the flavors and allows it to clear up naturally.

10. Taste and adjust (optional).

• What to do: Once fermentation is complete and the wine has cleared, taste it. If it’s too dry, you can back-sweeten with a sugar substitute or a small amount of simple syrup.
• What “good” looks like: A balanced flavor profile you enjoy.
• Common mistake: Adding too much sugar. This can restart fermentation or make it cloyingly sweet. Add small amounts and taste.

11. Bottle.

• What to do: Sanitize bottles, siphon the wine into them, and cap or cork securely.
• What “good” looks like: Clean bottles filled with clear coffee wine.
• Common mistake: Using dirty bottles. Just like the fermenter, bottles must be spotless.

Common mistakes (and what happens if you ignore them)

Decision rules (simple if/then)

• If your airlock is bubbling vigorously, then keep the fermenter undisturbed because the yeast is actively working.
• If your airlock has stopped bubbling for several days, then it’s likely primary fermentation is complete and it’s time to rack.
• If the coffee wine tastes too tart or acidic, then consider adding a small amount of simple syrup or a non-fermentable sweetener to balance it because acidity can be masked by sweetness.
• If you see fuzzy mold growing on the surface, then unfortunately, the batch is likely ruined and should be discarded because mold indicates spoilage.
• If you want a higher alcohol content, then add more sugar initially because yeast consumes sugar to produce alcohol.
• If you want a lower alcohol content, then use less sugar initially because less sugar means less food for the yeast.
• If the wine is cloudy after several weeks in secondary, then give it more time to age and clear because time is often the best clarifier.
• If you used a paper filter for your coffee base, then consider if you want to retain more coffee oils by using a metal or cloth filter next time because oils contribute to mouthfeel and flavor complexity.
• If you notice a strong sulfur smell (rotten eggs), then it might be a sign of stressed yeast and could benefit from a little aeration (if still early in fermentation) or a yeast nutrient because yeast needs proper conditions.
• If you want to experiment with different coffee origins, then start with a clean, neutral base and let the coffee’s character shine through because the coffee itself is the main flavor component.
• If you are worried about oxidation, then minimize splashing during racking and bottling because oxygen can degrade the wine’s flavor over time.

FAQ

What kind of coffee should I use?

Use good quality, freshly roasted coffee. The origin and roast level will significantly impact the final flavor profile of your coffee wine. Experiment to see what you like best.

How much alcohol will my coffee wine have?

This depends on how much sugar you add and the tolerance of your yeast. A typical range could be anywhere from 8% to 15% ABV, but it’s best to use a hydrometer to get an accurate estimate.

Can I make coffee wine without yeast?

No, fermentation requires yeast to convert sugars into alcohol and carbon dioxide. You can’t make traditional wine without it.

How long does it take to make coffee wine?

Primary fermentation usually takes 1-3 weeks. Aging can take anywhere from a few weeks to several months for the flavors to develop and the wine to clear. Patience is a virtue here.

What if my coffee wine smells like vinegar?

This is a common sign of acetic acid bacteria taking over, essentially turning your wine into vinegar. This usually happens due to excessive oxygen exposure during fermentation. Unfortunately, the batch is likely ruined.

Can I add other flavors to my coffee wine?

Absolutely! Many people add spices like cinnamon, vanilla, or even a touch of chocolate during the aging process. Just be sure to sanitize any additions.

How do I know when fermentation is finished?

The bubbling in your airlock will slow to an occasional bubble every few minutes, or stop altogether. Using a hydrometer to measure specific gravity is the most accurate way; when it’s stable for a few days, fermentation is done.

Is coffee wine the same as Kopi Luwak?

No, Kopi Luwak is a type of coffee bean that has been digested by a civet. Coffee wine is a fermented beverage made from coffee, not a special type of coffee bean.

What this page does NOT cover (and where to go next)

• Specific yeast strains and their properties.
• Advanced techniques for clearing wine (e.g., fining agents).
• Detailed breakdown of hydrometer readings and alcohol calculations.
• Recipes for coffee wine with specific flavor additions.
• Long-term aging and cellaring of coffee wine.