How to Make Bubbly Iced Coffee with Soda Water

Looking for a refreshing summer coffee that’s easy to make, visually striking, and tastes crisp without milk? Bubbly iced coffee—also called coffee soda or float coffee—is a growing favorite in cafés for its fizzy texture and light body. But getting the balance right between coffee strength, sweetness, and carbonation isn’t obvious. Here’s how pros do it.

To make a classic bubbly iced coffee, you’ll need 150cc of cold drip coffee, 90cc of soda water (like Sprite or 7-Up), ice cubes, sugar syrup, and simple fruit garnish. That’s just five core ingredients—and the whole drink comes together in under a minute once the coffee is brewed.

What Is Bubbly Iced Coffee?

Bubbly iced coffee is a cold mixed drink made by layering cold-brewed or cold-drip coffee over ice, adding sugar syrup, then gently pouring soda water to create a fizzy top layer. It’s not a true coffee float like an Irish coffee, nor a nitro coffee—it’s a light, fizzy iced coffee with a sweet-tangy finish, often garnished with citrus and cherry.

Why Use Cold Drip for This Drink?

Cold drip (or ice drip) coffee is ideal for bubbly iced coffee because low-temperature extraction preserves delicate fruit and floral notes while avoiding harsh bitterness. Unlike hot-brewed or even standard iced coffee, cold drip results in a smoother, naturally sweeter cup that pairs better with soda water and doesn’t get muddy when iced.

The article specifies using a 60g batch of medium-to-dark roasted “Mamba” coffee beans brewed via ice drip method, yielding 720cc total (120cc per cup). For a single serving, 150cc of this cold drip coffee is used—about double the strength of typical Americano dilution, but balanced by ice, sugar, and soda.

Key Ingredients & Tools

This drink uses a very specific set of ingredients and tools to get the right texture and flavor:

• Coffee: 60g Mamba beans (medium to dark roast), brewed as 720cc cold drip coffee (120cc per cup)
• Soda: 90cc soda water—either light-tasting Sprite or sweeter 7-Up
• Sweetener: 30cc fruit syrup (not simple syrup, specified as “”)
• Ice: Crushed ice + regular ice cubes
• Garnish: 1 lemon slice and 1 red cherry
• Tools: Ice drip setup, spherical filter paper, grinder, shaker bottle , serving glass (HG9811 shaped glass)

Step-by-Step: How to Make It

Follow these steps to build the drink just like a café would:

1. Brew the cold drip coffee: Use an ice drip system to extract 720cc of coffee from 60g of Mamba beans. This should follow standard ice drip procedures and yield enough for six 120cc servings.
2. Assemble the base: In your serving glass (HG9811 shaped glass), add about 150cc of the cold drip coffee, a handful of crushed ice, and 30cc of fruit syrup.
3. Add soda gently: Slowly pour 90cc of soda water into the glass while rotating the cup. This creates a layered, fizzy effect without losing the bubbles.
4. Garnish: Top with a lemon slice and a single red cherry on the rim or floating on the drink.
5. Serve: Your bubbly iced coffee is ready to drink immediately.

Why This Works

The combination of cold-extracted coffee, minimal ice melt, controlled sweetness, and gentle soda integration gives this drink a clean, refreshing profile. The effervescence lifts the coffee aroma, while the fruit garnish adds a visual and flavor contrast. Crucially, the use of a medium-to-dark roast (Mamba) ensures enough body to stand up to the soda without becoming overly sharp or sour.

Bean Choice Matters

The original recipe calls for Mamba beans at medium-to-dark roast. These beans are chosen specifically because darker roasts interact more predictably with sweeteners and soda, and maintain body when iced. While the article does not demand a specific origin, FrontStreet Coffee offers several high-quality cold drip beans that would work well in this recipe.