How to Make Kombucha at Home: A Complete Beginner's Guide
What is kombucha?
Kombucha is an ancient fermented beverage originating from East Asia, known for its probiotic benefits, refreshing taste, and flavoring possibilities. It contains live cultures, organic acids, and B vitamins, which support gut health and the digestive system.
In this guide, you will learn how to safely and successfully prepare homemade kombucha, step by step – from choosing ingredients and equipment to fermentation, flavoring, and storage.
Benefits of making kombucha at home
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Lower cost compared to bottled kombucha from the store
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Full control over sweetness, fermentation level, and flavors
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Creative freedom – you can experiment with fruits, herbs, and spices
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Probiotic effect, beneficial for the gut (with moderate consumption)
How does fermentation work?
The process of making homemade kombucha involves two main phases:
1. First Fermentation (F1)
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SCOBY converts sweetened tea into raw kombucha
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Duration: 7–14 days at 24–29 °C
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pH should drop below 4.2 for safety
2. Second Fermentation (F2)
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The drink is bottled with added fruits or juice
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Duration: 2–4 days
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Natural carbonation develops
Required equipment
| Tool | Minimum | For advanced |
|---|---|---|
| Fermentation vessel | 3L glass jar | 5L "continuous brew" dispenser |
| Lid | Thick cloth + rubber band | Membrane lid |
| Bottles for second fermentation | Grolsch glass bottles | Pressure-resistant glass |
| Thermometer | Optional | Digital with alarm |
| pH strips | pH range 2–6 | Digital pH meter |
What ingredients are suitable?
Tea
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✅ Best choice: black tea (English Breakfast, Ceylon)
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✅ Green tea – finer taste, faster fermentation
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❌ Avoid flavored teas with essential oils (Earl Grey)
Sugar
| Type of sugar | Result | Comment |
|---|---|---|
| White granulated | Excellent taste | Recommended for beginners |
| Brown cane | Caramel taste | Slower fermentation |
| Honey, agave | Unpredictable | Risk for SCOBY – for experienced users |
SCOBY and starter liquid
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Obtain SCOBY from a trusted source or friend
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Never use vinegar as a starter liquid!
Starter liquid for making kombucha is part of already fermented kombucha, added along with SCOBY to a new batch of sweetened tea.
Kombucha recipe – step by step
Table of basic ratios:
| Quantity | Water | Tea | Sugar | Starter liquid |
|---|---|---|---|---|
| 1 liter | 800 ml hot + 200 ml cold | 5 g | 50 g | 125 ml |
| 3 liters | 2.4 L + 600 ml | 15 g | 150 g | 375 ml |
| 4 liters | 3.2 L + 800 ml | 20 g | 200 g | 500 ml |
Steps:
1. Prepare sweetened tea
Boil the water, dissolve the sugar, add the tea, and let it steep for 10–15 min.
2. Cool and add SCOBY
Strain, add cold water until <30 °C. Add SCOBY and starter liquid.
3. First fermentation (F1)
Cover the vessel, place it in a warm, airy spot for 7–14 days. Check pH and taste.
4. Second fermentation (F2)
Remove SCOBY and part of the kombucha for a new batch. Bottle the rest with fruits or juice and leave for 2–4 days for carbonation.
Flavoring: Inspiring ideas
| Combination | Quantity per 500 ml | Taste and effect |
|---|---|---|
| Raspberries + lime | 5 raspberries + 1 slice lime | Bright fruity tartness |
| Ginger + lemon | ½ tsp grated ginger + 2 slices lemon | Refreshing spicy |
| Lavender + blueberries | 1 pinch + 10 blueberries | Floral and slightly sweet |
💡 Use frozen fruits for more intense fermentation.
Storage and shelf life
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Kombucha can be stored in the refrigerator for up to 3 months
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Carbonation weakens over time, acidity increases
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SCOBY can be stored in a "SCOBY hotel" with periodic feeding
Common problems and solutions
| Problem | Cause | Solution |
|---|---|---|
| Mold | pH > 4.2, contamination | Discard everything, sterilize the vessel |
| Weak carbonation | Too little sugar, loose caps | Add 1 tsp sugar and use sealed bottles |
| Too sweet kombucha | Low temperature | Extend fermentation or warm up |
| Too sour | Excessive fermentation | Use as vinegar, ferment for a shorter time |
Making homemade kombucha is not only economical and healthy but also an inspiring hobby. With the right ingredients, tools, and a little practice, you'll be able to create unique flavors, perfectly suited to your preferences.
Frequently Asked Questions (FAQ)
How much alcohol does homemade kombucha contain?
Under 1% with normal fermentation; can reach 2–3% if left for a long time.
Can I use only green tea?
Yes, but fermentation is faster and the taste is lighter.
Can I use a sweetener instead of sugar?
No – SCOBY feeds on sucrose; alternatives disrupt the process.
Do I need to sterilize the jar?
Not mandatory – washing with hot water and rinsing with vinegar is sufficient.