How to Make Coffee Soda: A Refreshing Sparkling Coffee

Flavor and Tasting Notes

Coffee soda is a refreshing drink combining brewed coffee, often cold brew or espresso, with carbonated soda water and sometimes a little sweetener. The carbonation lifts the coffee's bright, acidic notes into a bubbly, effervescent, and unexpectedly light cold beverage.

Effervescent & bright: Coffee soda marries the acidity of specialty coffee with the lively carbonation of soda water. The result is a crisp, refreshing drink with notes of citrus, cola and chocolate depending on the beans. The bubbles lift aromatics and lighten the body, creating an unexpected but satisfying pairing. Sweetened coffee sodas can taste like a coffee cola, while unsweetened versions highlight the bean’s inherent fruitiness. A slice of citrus or a dash of simple syrup can elevate complexity.

Preparation and Recipe

1. Brew concentrate: Brew a 4 oz (120 ml) portion of strong cold brew concentrate or double-strength filter coffee. Chill completely.
2. Prepare soda base: Fill a glass with ice. Add 4-6 oz (120-180 ml) of chilled tonic or sparkling water.
3. Mix: Slowly pour the coffee concentrate over the soda to maintain bubbles. Optionally add ½ oz simple syrup or flavored syrup (vanilla, citrus) for sweetness.
4. Garnish: Add a slice of lemon or orange. Serve immediately with a straw.

Alternative: Use bottled coffee soda such as Manhattan Special as a ready-to-drink option.

Dialing in and Troubleshooting

• If the drink is too bitter or flat, ensure the coffee is chilled and the tonic water is fresh; stale bubbles diminish the effect.
• Using tonic vs. sparkling water changes the flavor; tonic’s quinine adds bitterness that complements bright, fruity coffees.
• Adjust coffee-to-soda ratio to taste: more coffee for intensity, more soda for lightness.
• Avoid shaking or stirring vigorously after mixing, which will release carbonation prematurely.
• For a richer body, use a nitro cold brew.
• Serve in a tall glass to appreciate the cascading bubbles.

History and Culture

Carbonated coffee drinks have existed for over a century. Manhattan Special in New York has bottled coffee soda since 1895, pairing espresso with seltzer and sugar. While many major soda companies experimented with coffee flavors, few succeeded. In recent years, specialty coffee shops and independent brands revived coffee soda as a refreshing summer drink, blending small-batch cold brew with sparkling water and citrus. Although still niche compared with cold brew, coffee soda appeals to those seeking an effervescent twist on their caffeine fix.

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