Basic Kombucha First Fermentation

Published · Updated

Starter Guide: Basic Kombucha First Fermentation

🍹 Foundational Kombucha F1

The essential master recipe for brewing raw probiotic kombucha at home using whole tea leaves, pure organic sugar, and a healthy living SCOBY culture.

⏱️ Prep Time
5 Mins
⏳ Ferment / Rest
7-10 Days Ferment
🍽️ Yield
3.5 Litres
🟢 Difficulty
Easy

🥣 Ingredients

  • ✓
    4 Litres — Filtered Water
  • ✓
    4 Bags/tsp — Black Tea
  • ✓
    1 Cup (200g) — White Sugar
  • ✓
    1 SCOBY — + 1 Cup Starter Tea
Equipment Needed:
3 to 5 Litre glass brewing jar, tight-weave cotton cloth, rubber band, and stainless steel / wooden spoon.

👩‍🍳 Step-by-Step Instructions

1

Brew & Sweeten

Steep tea in 1L hot water. Dissolve sugar completely. Remove bags.
2

Cool Down

Add 3L cold water. Temp must be below 30°C (86°F) to save the SCOBY.
3

Add Culture

Pour into glass jar. Add SCOBY and starter tea. Cover with cloth.
4

Ferment

Store out of sun for 7-14 days. Taste test starting at day 7.

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💡 Breathing Culture Tip

Never seal the jar with an airtight lid during F1! Your SCOBY requires continuous oxygen flow to metabolize tea and sugar into healthy organic acids.

❓ Frequently Asked Questions

How long does the First Ferment (F1) take?

F1 usually takes between 7 and 14 days. The duration depends entirely on the room temperature; warmer temperatures speed up fermentation.

Why must the tea cool before adding the SCOBY?

If the tea is too hot (above 35°C), it will pasteurize (kill) the live bacteria and yeast in the SCOBY, preventing fermentation.

What kind of tea should I use?

Black tea is standard and provides the best nutrients. Green tea can also be used. Avoid flavored teas containing oils.

Why is white sugar necessary?

The SCOBY relies on simple sugars. Plain white granulated sugar provides the cleanest food source. Honey can damage the SCOBY over time.

What is the starter tea for?

Starter tea lowers the pH of the new batch immediately, creating an acidic environment that prevents mold before the SCOBY establishes itself.

What is the ideal temperature for F1?

The ideal temperature range is 20°C to 24°C (68°F to 75°F).

Do I need to clean my jar?

The jar must be clean. Wash it with hot water and soap, rinse thoroughly, and consider a final rinse with vinegar to eliminate soap residue.

How do I know when the F1 is finished?

It’s finished when it tastes slightly sweet and pleasantly tart. If it tastes strongly of vinegar, it is over-fermented.

What is the film on top of the liquid?

That is the new baby SCOBY forming! It is a sign of a healthy, active fermentation.

Can I use decaf tea?

You can use decaf tea, but fermentation may be slower and the SCOBY may not grow as vigorously over time.