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Cold brew already brings out the smooth, chocolate-forward character of Fine Robusta. But when you pair it with chilled Schweppes Tonic, something unexpected happens — the cup becomes brighter, sweeter, and slightly fruity, almost like apricot. This recipe is simple, refreshing, and perfect if you want a modern twist on Vietnamese-style cold brew.

Why Fine Robusta Works Beautifully in Cold Brew

Fine Robusta’s natural strengths show clearly in cold extraction:
• bold cacao-like flavor
• low acidity
• smooth body
• high clarity even at long steep times

These qualities give you a cold brew that’s sweet, round, and stable — ideal for mixing with tonic without the drink becoming sour or thin.

What You Need

• Fresh Fine Robusta beans
• Grinder
• Jar or French Press
• Filter or fine sieve
• Schweppes Tonic (classic tonic water)
• Ice

Grind Size for Cold Brew

Use a medium–coarse grind: 9–10 EK.
This grind prevents bitterness during long steeping and keeps the flavor clean.

Cold Brew Ratio

The most reliable ratio is:
1:8
For example:
• 50 g coffee
• 400 g water

This produces a concentrate that mixes well with tonic.

Step-by-Step Cold Brew Guide

1. Add 50 g of medium–coarse Fine Robusta (9–10 EK) into a jar.

2. Pour 400 g cold water over it.

3. Stir gently to ensure all grounds are wet.

4. Cover and steep for 18–24 hours in the fridge.

5. Strain through a filter or press if using a French Press.

At this point, you have a smooth, naturally sweet cold brew concentrate.

Mixing with Schweppes Tonic

This is where the magic happens.
Tonic brings carbonation + slight bitterness + citrus oils → creating a bright, fruity effect.

Basic Mix:
• 1 part cold brew concentrate
• 2 parts Schweppes Tonic
• Pour over ice

Stir gently.

You should immediately notice:
• the sweetness rises
• the bitterness becomes clean and refreshing
• a soft fruity note appears — many describe it as apricot-like
• the drink feels lighter but still strong and flavorful

Optional Enhancements

If you want more refinement:
• Add a thin slice of orange peel
• Drop 1–2 ice cubes more to open up sweetness
• Use a tall glass to preserve carbonation

But even the simple version tastes excellent.

What the Final Drink Should Taste Like

• bold coffee flavor with smooth chocolate notes
• lifted sweetness — noticeably higher than plain cold brew
• sparkling, refreshing finish
• subtle fruity tone (apricot, stone fruit, citrus peel)
• no sourness, no sharp acidity

It’s a modern café-style drink that still keeps the essential character of Fine Robusta.

Why You Should Try It

Cold Brew Tonic is one of the easiest ways to highlight how clean and stable Fine Robusta can taste, even when mixed. It’s refreshing, surprising, and perfect for anyone who wants something strong but bright, sweet, and different from the usual iced coffee.