Experimenting: Coffee With Coca-Cola

Quick answer

• While you can technically mix Coca-Cola with brewed coffee, it’s not a traditional or recommended brewing method.
• The acidity and sweetness of Coca-Cola will significantly alter the coffee’s flavor profile, often masking its natural notes.
• This combination is more about creating a novel beverage than achieving optimal coffee taste.
• If you’re curious, start with a small ratio of Coca-Cola to coffee to gauge your preference.
• Expect a sweet, tangy, and potentially less nuanced coffee experience.
• For a classic coffee flavor, stick to water as your brewing liquid.

Who this is for

• Adventurous home baristas looking to experiment with unusual coffee flavor combinations.
• Individuals curious about the taste of mixing soda with coffee for a unique beverage.
• Those who enjoy sweet and tangy drinks and want to see how it translates to coffee.

What to check first

Brewer type and filter type

Before you even consider Coca-Cola, ensure your brewing equipment is functioning correctly. Whether you use a drip machine, French press, pour-over, or espresso machine, understanding its mechanics is key. The filter type (paper, metal, cloth) also impacts the final cup by affecting oil and sediment filtration. For this experiment, the brewer type will matter less for the process itself and more for how you incorporate the Coca-Cola.

Water quality and temperature

Traditionally, water quality is paramount for good coffee. Filtered water is generally recommended to avoid off-flavors from tap water. Water temperature is also critical for proper extraction, typically between 195°F and 205°F. However, when using Coca-Cola, the “water” is replaced by soda. This means the quality and temperature of the soda will become the primary liquid variables.

Grind size and coffee freshness

The grind size must match your brewing method to ensure proper extraction. Too fine, and you risk bitterness; too coarse, and you get a weak, sour cup. Freshly roasted and ground coffee beans offer the best flavor. For this Coca-Cola experiment, using a medium grind suitable for drip or pour-over might be a good starting point, as you’ll be introducing a strong flavor that might mask subtle grind differences.

Coffee-to-water ratio

A common starting point for hot coffee is a ratio of 1:15 to 1:18 (coffee to water by weight). This ratio is crucial for balancing strength and flavor. When substituting Coca-Cola for water, you’re not just changing the liquid; you’re introducing sugar and carbonation, which will drastically affect the perceived strength and taste. You’ll likely need to adjust how much coffee you use.

Cleanliness/descale status

A clean brewer is essential for good coffee. Coffee oils can build up and turn rancid, imparting stale flavors. Regular descaling removes mineral deposits that can affect performance and taste. For this experiment, a clean brewer is still important to ensure that any unusual flavors are due to the Coca-Cola, not old coffee residue.

Step-by-step (brew workflow)

This workflow assumes you’re trying to brew coffee with Coca-Cola as the liquid, rather than mixing them after brewing. This is a highly experimental process.

1. Gather your ingredients: You’ll need Coca-Cola (chilled or room temperature, depending on your preference for the final drink’s temperature), coffee grounds, and your brewing device.

2. Prepare your brewer: Ensure your coffee maker is clean and assembled. For example, if using a drip machine, insert a filter.

3. Measure your coffee grounds: Start with a ratio that’s less coffee than you’d typically use with water. For example, if you normally use 30g of coffee for 500ml of water, try 20-25g for 500ml of Coca-Cola.

4. Add grounds to the brewer: Place the measured coffee grounds into the filter basket or brewing chamber.

5. Prepare the Coca-Cola: Decide if you want to use cold Coca-Cola (which will result in a cold, possibly carbonated beverage if not heated) or if you intend to heat it. Heating Coca-Cola can be tricky due to its carbonation and sugar content, and may alter its flavor significantly.

6. Introduce Coca-Cola to the grounds: This is where it gets experimental.

• For drip/pour-over: Slowly pour a small amount of Coca-Cola over the grounds to bloom them. What “good” looks like: The grounds should swell and release some initial fizz. A common mistake: Pouring too quickly, which can cause grounds to overflow.
• For French press: Add the Coca-Cola to the brewing chamber with the grounds.

7. Complete the “brew” cycle:

• For drip/pour-over: Slowly add the remaining Coca-Cola, mimicking a normal brew cycle. What “good” looks like: A steady flow of liquid into the carafe. A common mistake: Using hot Coca-Cola that foams excessively or loses too much carbonation too quickly.
• For French press: Add the rest of the Coca-Cola, stir gently if desired, and let it steep for your usual time (e.g., 4 minutes).

8. Press (for French press): Slowly and steadily press the plunger down. What “good” looks like: Smooth, even resistance. A common mistake: Pressing too fast, which can force grounds past the filter.

9. Serve immediately: Pour the resulting beverage into a glass. What “good” looks like: A dark liquid with the aroma of coffee and a hint of cola. A common mistake: Letting it sit too long, which can affect carbonation and flavor.

10. Taste and adjust: Sip your creation. You’ll likely find it very sweet and tangy.

11. Consider chilling (if not already cold): If you used room-temperature Coca-Cola, you might want to chill the final beverage, perhaps over ice.

12. Clean up: Thoroughly clean your brewing equipment, as Coca-Cola’s sugar can leave a sticky residue.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Using hot Coca-Cola	Excessive foaming, loss of carbonation, burnt sugar taste, altered flavor.	Use chilled Coca-Cola and consider brewing over ice, or very gently warm it if absolutely necessary.
Using too much Coca-Cola	Overpowers coffee flavor, results in an overly sweet and syrupy drink.	Start with a lower ratio of Coca-Cola to coffee grounds, and adjust to taste.
Using too little Coca-Cola	May result in a concentrated, overly bitter coffee with a hint of cola.	Ensure you use enough liquid to extract the coffee grounds properly.
Not accounting for sugar content	Leads to a cloyingly sweet beverage that is difficult to drink.	Be mindful of the sweetness; you may not want to add any additional sweeteners.
Over-extracting the coffee grounds	Intensifies bitterness, which can clash with the cola’s sweetness and tang.	Use a coarser grind or shorter brew time than you might for water.
Under-extracting the coffee grounds	Results in a weak, sour coffee flavor that doesn’t blend well with cola.	Ensure sufficient contact time between the grounds and the Coca-Cola.
Using stale or poorly roasted coffee	The off-flavors will be amplified and clash with the cola’s artificial notes.	Use fresh, quality coffee beans to give the experiment the best chance of a palatable outcome.
Not cleaning the brewer afterward	Sticky residue, potential for mold, and off-flavors in future brews.	Rinse and clean your brewer immediately after use.
Expecting a traditional coffee flavor	Disappointment, as the cola fundamentally changes the beverage’s character.	Approach this as a novel drink creation, not a quest for perfect coffee.
Using diet or zero-sugar cola	Different artificial sweeteners will create a distinct, potentially off-putting taste.	Stick to regular Coca-Cola for the intended (sweet, tangy) flavor profile.

Decision rules (simple if/then)

• If you want a less sweet drink, then use less Coca-Cola and more coffee grounds because the coffee’s bitterness will balance the cola’s sweetness.
• If you find the drink too bitter, then try a coarser grind or a shorter brew time because over-extraction can exacerbate bitterness.
• If you are concerned about carbonation, then use chilled Coca-Cola and pour it gently to minimize fizzing during the brew process.
• If you want to taste more of the coffee’s origin notes, then this experiment is likely not for you because Coca-Cola’s strong flavor profile will dominate.
• If you prefer a cold beverage, then use chilled Coca-Cola and consider brewing over ice because heating Coca-Cola can alter its flavor and carbonation negatively.
• If you want to experiment with different cola flavors, then try a different brand or type of cola, but be aware that sweeteners and flavorings will vary significantly.
• If you find the resulting beverage too tangy, then try using a coffee roast that is naturally less acidic, like a darker roast, because it might complement the cola’s acidity better.
• If you are sensitive to caffeine, then be aware that you are still consuming caffeine from the coffee, in addition to any caffeine in the cola.
• If you are looking for a healthy beverage, then this combination is high in sugar and not recommended because both coffee and cola contribute to the overall sugar content.
• If you want to avoid a syrupy texture, then use a ratio that favors Coca-Cola less, or consider diluting the final mixture with a little water or ice.

FAQ

Can you actually brew coffee using Coca-Cola instead of water?

Yes, you can technically use Coca-Cola as the liquid in many brewing methods, like drip coffee makers or French presses. However, it’s highly experimental and will drastically change the flavor profile of the coffee.

What will coffee brewed with Coca-Cola taste like?

Expect a very sweet, tangy, and somewhat carbonated beverage. The natural flavors of the coffee beans will likely be masked by the strong, distinct taste of Coca-Cola. It will not taste like traditional brewed coffee.

Is it safe to heat Coca-Cola for brewing coffee?

Heating Coca-Cola can be unpredictable. It can foam excessively, lose carbonation rapidly, and the sugar can caramelize or burn, altering the flavor. It’s generally safer and more predictable to use chilled Coca-Cola.

How much coffee should I use if I’m brewing with Coca-Cola?

Start with less coffee than you would normally use with water. The sweetness and acidity of Coca-Cola can make the coffee taste stronger than it is. Experiment with ratios, perhaps starting at 1:18 or 1:20 (coffee to cola by weight).

Will using Coca-Cola make my coffee maker dirty?

Yes, Coca-Cola contains sugar, which can leave a sticky residue. It’s important to clean your coffee maker thoroughly after any experiment involving soda to prevent buildup and ensure future brews are clean.

Can I mix brewed coffee with Coca-Cola after brewing?

Absolutely. This is a more common way to combine the two. You can pour some brewed coffee into a glass of Coca-Cola, or vice versa, and adjust to your taste, often over ice.

Does Coca-Cola add caffeine to the coffee?

Yes, regular Coca-Cola contains caffeine. So, if you brew coffee with it, you’ll be consuming caffeine from both the coffee and the soda.

Is this a popular coffee drink?

No, brewing coffee directly with Coca-Cola is not a traditional or popular method. It’s considered an experimental beverage for those seeking novel flavor combinations.

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

• Specific recipes for Coca-Cola coffee cocktails or mocktails.
• Detailed analysis of the chemical reactions between coffee solubles and Coca-Cola’s ingredients.
• Comparisons of using different cola brands or soda types for brewing.

If you’re interested in exploring further:

• Look into recipes for coffee-based mixed drinks and mocktails.
• Research traditional coffee brewing techniques for optimal flavor extraction.
• Explore flavored coffee syrups and additions that are designed to complement coffee.