Experimenting With Coffee And Sparkling Water
Quick answer
- Yes, you can make coffee with sparkling water.
- The carbonation can affect the extraction and flavor.
- Expect a different taste profile than traditional coffee.
- It’s best to use sparkling water that’s plain, with no added flavors or sweeteners.
- Consider it an experiment to see what you like.
- Cold brew or flash-chilled coffee works best for this.
Who this is for
- The adventurous home barista looking for new flavor experiences.
- Coffee lovers who enjoy experimenting with different brewing methods.
- Anyone curious about how carbonation impacts coffee extraction and taste.
What to check first
- Brewer type and filter type:
This isn’t about a specific brewer. The key is how you’ll incorporate the sparkling water. Cold brew concentrate is a good starting point because you can dilute it with sparkling water later. If you’re feeling bold, you might try a pour-over, but be ready for a wild ride. Paper filters are standard.
- Water quality and temperature:
Use good quality, plain sparkling water. No fancy flavors or sweeteners, please. The bubbles are the star here. For cold brew, you’ll use cold water to start. If you’re thinking hot coffee with sparkling water… well, that’s a different, possibly explosive, experiment. Stick to cold or cool for safety and sanity.
- Grind size and coffee freshness:
Freshly roasted and ground coffee is always best. For cold brew, a coarser grind is your friend. It helps prevent over-extraction during the long steep. If you’re going for a flash chill, a medium grind is usually good.
- Coffee-to-water ratio:
This is where things get a bit fluid. Start with your usual cold brew ratio, like 1:4 or 1:5 (coffee to water) for concentrate. You’ll then dilute this concentrate with sparkling water to taste. Don’t go straight to brewing with the bubbly stuff; it’s too much at once.
- Cleanliness/descale status:
Always make sure your brewing gear is clean. Old coffee oils can turn even the best beans into something bitter. A clean brewer means the sparkling water experiment has a fair shot at tasting good.
Step-by-step (brew workflow)
Here’s a solid way to get started with sparkling water coffee, focusing on a cold brew dilution method.
1. Grind your coffee beans:
- What to do: Grind your favorite beans to a coarse consistency, like sea salt.
- What “good” looks like: Uniform particles, not too powdery.
- Common mistake: Grinding too fine. This can lead to a muddy, over-extracted cold brew concentrate. Avoid this by using a burr grinder and setting it coarse.
2. Combine coffee and cold water:
- What to do: Add your coarse grounds to your brewing vessel (a jar or French press works well). Pour cold, filtered water over the grounds. Aim for a ratio like 1:4 (e.g., 8 oz coffee to 32 oz water).
- What “good” looks like: All grounds are saturated.
- Common mistake: Not fully saturating the grounds. This leads to uneven extraction. Give it a gentle stir to make sure everything is wet.
For combining coffee and cold water, a French press works exceptionally well as a brewing vessel. This French press is a great option for making your cold brew concentrate.
- Wash in warm, soapy water before first use and dry thoroughly
- Not for stovetop use
- Turn lid to close spout
- Easy-to-clean glass carafe
3. Steep the coffee:
- What to do: Cover the vessel and let it steep at room temperature or in the fridge for 12-24 hours. Longer steeps generally yield a stronger concentrate.
- What “good” looks like: A rich, dark liquid.
- Common mistake: Steeping for too short a time. You won’t get a strong enough concentrate to dilute properly. Patience is key here.
4. Filter the concentrate:
- What to do: Strain the coffee concentrate through a fine-mesh sieve lined with cheesecloth or a coffee filter. You might need to do this in batches.
- What “good” looks like: A clear, sediment-free liquid.
- Common mistake: Rushing the filtering process. This can result in gritty coffee. Let gravity do its work.
5. Chill the concentrate:
- What to do: Once filtered, store the concentrate in an airtight container in the refrigerator. Let it cool completely.
- What “good” looks like: Cold, ready-to-mix concentrate.
- Common mistake: Trying to mix warm concentrate with sparkling water. It won’t be as refreshing, and the bubbles might dissipate faster.
6. Prepare your sparkling water:
- What to do: Open a chilled bottle or can of plain sparkling water.
- What “good” looks like: Plenty of active bubbles.
- Common mistake: Using flat sparkling water. The whole point is the fizz! Make sure it’s fresh and cold.
7. Combine concentrate and sparkling water:
- What to do: Fill a glass with ice. Pour in your desired amount of cold brew concentrate (start with maybe 2-3 oz). Slowly top it off with chilled sparkling water.
- What “good” looks like: A refreshing, bubbly coffee drink.
- Common mistake: Adding sparkling water to the concentrate too quickly or too vigorously. This can cause excessive foaming and loss of carbonation. Pour gently over ice.
8. Stir gently and taste:
- What to do: Give the drink a very gentle stir to combine. Taste and adjust the ratio of concentrate to sparkling water if needed.
- What “good” looks like: A balanced, delicious, and fizzy coffee.
- Common mistake: Over-stirring. You’ll knock out all those precious bubbles. A gentle swirl is all you need.
Common mistakes (and what happens if you ignore them)
| Mistake | What it causes | Fix |
|---|---|---|
| Using flavored or sweetened sparkling water | Unpleasant, muddled flavors; coffee taste is lost. | Always opt for plain, unflavored sparkling water. |
| Using hot water with sparkling water | Dangerous pressure buildup, potential explosion, loss of carbonation. | Stick to cold brew or flash-chilled methods. Never mix hot liquids with carbonated beverages. |
| Not grinding coffee coarse enough for cold brew | Cloudy, bitter, over-extracted concentrate. | Use a burr grinder set to a coarse setting for cold brew. |
| Aggressively stirring the final drink | Rapid loss of carbonation, resulting in a flat, less enjoyable beverage. | Stir gently with a spoon or swirl the glass to combine without deflating the bubbles. |
| Using stale or pre-ground coffee | Flat, dull coffee flavor that won’t shine through the carbonation. | Always use freshly roasted and ground beans for the best results. |
| Adding sparkling water to hot coffee | Dangerous foaming, potential burns, and the carbonation will vanish instantly. | This is a hard no. The chemistry just doesn’t work safely or effectively. |
| Not chilling all components | Warm drink, less refreshing, bubbles dissipate faster. | Ensure both your coffee concentrate and sparkling water are well-chilled before mixing. |
| Rushing the filtering process | Gritty, sediment-filled coffee concentrate. | Let the filtration process take its time. Use multiple filters if necessary. |
| Using too much concentrate | Overpowering, bitter taste; the sparkling water’s subtlety is lost. | Start with a smaller amount of concentrate and gradually add more until the flavor is balanced. |
| Not cleaning brewing equipment | Off-flavors that interfere with the experiment. | A clean brewer ensures the true flavors of coffee and sparkling water can be appreciated. |
Decision rules (simple if/then)
- If you want a less intense coffee flavor, then use more sparkling water because it dilutes the coffee concentrate further.
- If your coffee tastes too bitter, then try a coarser grind for your next cold brew batch because finer grinds can over-extract.
- If you want to experiment with flash-chilled coffee, then brew hot coffee over ice and then mix that chilled coffee with sparkling water because this cools it down quickly.
- If your sparkling coffee is flat, then ensure your sparkling water is fresh and cold before mixing because stale or warm water won’t hold bubbles well.
- If you’re sensitive to acidity, then try a darker roast coffee because darker roasts are generally less acidic.
- If you want a stronger coffee flavor, then use less sparkling water because it will result in a higher coffee-to-liquid ratio.
- If you notice excessive foaming when mixing, then pour the sparkling water more slowly and gently over the ice and concentrate because a rapid pour can agitate the bubbles too much.
- If the taste is too weak, then use more coffee concentrate in your next glass because you need a higher coffee-to-liquid ratio.
- If you’re concerned about safety, then never attempt to heat or boil sparkling water for coffee because this can create dangerous pressure.
- If you want to taste the nuances of the coffee, then use unflavored sparkling water because added flavors can mask the coffee’s profile.
- If your cold brew concentrate tastes weak, then try steeping it for a few more hours next time because longer steeping extracts more flavor.
FAQ
Can I use carbonated water that isn’t plain?
It’s best to stick with plain sparkling water. Flavored or sweetened versions will clash with the coffee and create an unpredictable, likely unpleasant, taste.
Will this make my coffee taste like soda?
Not exactly. While it will be bubbly, the coffee flavor is still dominant. It’s more like a sparkling coffee refresher than a soda.
Is it safe to mix hot coffee with sparkling water?
Absolutely not. Never mix hot liquids with carbonated beverages. The rapid release of CO2 can cause dangerous foaming and potential explosions. Always use cold or cool methods.
How long will the bubbles last?
The carbonation will start to dissipate as soon as it’s mixed. For the best experience, drink it immediately after preparing.
What kind of coffee beans are best for this?
Lighter roasts might offer brighter, more interesting notes that can play well with the fizz, but any good quality bean you enjoy for cold brew will work. Experiment to see what you prefer.
Can I use a regular coffee maker and then add sparkling water?
You could, but the resulting hot coffee would likely taste flat and the carbonation wouldn’t integrate well. Cold brew or flash-chilled coffee is the way to go.
Does the type of sparkling water matter (e.g., mineral vs. seltzer)?
Slightly. Mineral waters can have their own subtle flavors. For a clean experiment, a neutral seltzer or club soda is often preferred.
What if I don’t have time for cold brew?
You can try a “flash chill” method. Brew a strong batch of hot coffee using your usual method, then pour it immediately over a large amount of ice. Once chilled, mix this coffee with sparkling water.
What this page does NOT cover (and where to go next)
- Detailed explanations of the chemical reactions between coffee oils and carbonation.
- Specific brand recommendations for sparkling water or coffee beans.
- Advanced techniques like using a carbonation system to infuse coffee.
- Recipes for alcoholic coffee cocktails using sparkling water.