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Probiotic fruit-flavoured kombucha served in a bottle with colourful fruit pieces
Homemade fruit-flavoured kombucha undergoing second fermentation with fresh berries

Probiotic fruit-flavoured kombucha

Author: Flavelo
Recipes Vegetarian & Vegan Quick Meals
Kombucha is a distinctive drink in itself, but the real magic happens during the second fermentation (F2). At this point, the bottled tea gets no air, so the remaining yeasts begin to devour the sugar dissolving from the fruit, producing fine, sharp bubbles in exchange. This is the moment when simple fermented tea is born into a lively, champagne-like, fruity soda. The secret lies in patience and high-quality, ripe fruit, which gives the drink its soul.
🕒 Prep Time 20 mins
⌛ Total Time 4 days 20 mins
🍽️ Servings 6 servings
🔥 Calories 45 kcal
🌍 Cuisine International

Ingredients

Equipment Needed

  • Swing-top bottles (airtight sealable, important for pressure)
  • Funnel (for mess-free filling)
  • Plastic sieve (metal can react with acids)
  • Chopping board and knife

Instructions

1 ✓

Prepare the swing-top bottles: wash them with hot water and let them dry completely. Cleanliness is key to preventing wild yeasts from proliferating.

Tip: Do not use washing up liquid for rinsing, or if you do, rinse very thoroughly, because chemical residues can kill the kombucha culture.
2 ✓

Wash the fruits, hull them, and cut into very small cubes, or crush with a fork. This way they contact the liquid over a larger surface area and transfer their flavour faster.

Tip: The pulpier the fruit, the more sugar is released from it, providing food for the yeasts for bubble formation.
3 ✓

Add the fruits to the bottom of the bottles. They should fill about 10-20% of the bottle.

Tip: Don't put too much in, because the fruit pulp displaces space, and the drink can overflow when foaming.
4 ✓

Fill the bottles with the ready kombucha, but leave at least 3-4 fingers of empty space (headroom) at the neck. This is needed due to gas expansion.

Tip: If there isn't enough space, pressure can burst the bottle, or the drink erupts like a geyser when opening.
5 ✓

Seal the bottles airtight, and place in a dark, room temperature place (20-25°C) for 2-4 days. This is the second fermentation.

Tip: Microorganisms work faster in warmth. In a colder place, the process is slower.
6 ✓

Once a day, carefully unclip the cap to let excess gas escape with a hiss ('burping'). If it foams a lot, put it in the fridge.

Tip: This prevents bottle explosions. If it hisses strongly, the carbonation is ready.
7 ✓

When you are satisfied with the fizz, strain the drink into a clean bottle (optional, if you like fruit pieces), and refrigerate until consumption.

Tip: Cooling 'puts the yeasts to sleep', so gas production stops, and the flavour stabilises.

Recipe FAQ

Why does it overflow when opening?
Too much carbon dioxide was produced. Chill thoroughly before opening, cold liquid holds gas better (like champagne).
What fruit should I use?
Any sweet, juicy fruit. Berries (strawberries, raspberries) flavour quickly and give nice colour.
How long does it keep?
Weeks in the fridge, but the taste continuously sours as the bacteria work.

Ingredients

  • 1000 ml Ripe plain kombucha (unfiltered)
  • 200 g Fresh, ripe fruit (e.g. strawberries, raspberries, blueberries mixed)