Authentic Homemade Kombucha
Probiotic-rich fermented tea
Kombucha is a centuries-old fermented tea that combines black or green tea with sugar and a SCOBY (Symbiotic Culture of Bacteria and Yeast). The result is a tangy, slightly sweet probiotic beverage rich in beneficial bacteria and acids.
Essential Equipment & Ingredients
- 1 SCOBY (Symbiotic Culture of Bacteria and Yeast) + 1 cup starter liquid
- 1 gallon (3.8L) filtered water
- 8-10 tea bags black or green tea (or 2-3 tbsp loose leaf)
- 1 cup (200g) organic cane sugar
- Glass jar (1-gallon minimum, non-metal)
- Coffee filter or cheesecloth (for breathable covering)
- Rubber band or string
- Thermometer (optional but helpful)
Instructions
SCOBY sourcing: You can obtain a SCOBY from a friend's kombucha batch, order online, or grow one from raw kombucha. If growing, use unpasteurized kombucha with no added probiotics—leave it in a jar with sweet tea for 30 days until a SCOBY forms.
First Fermentation (7-14 days):
- Brew sweet tea: Boil filtered water and steep black or green tea for 5-10 minutes. Dissolve sugar into hot tea while brewing.
- Cool completely: Allow sweet tea to cool to room temperature (68-85°F / 20-29°C is ideal). Hot liquid will kill the SCOBY culture.
- Prepare brewing vessel: Pour cooled sweet tea into clean glass jar. Add SCOBY and 1 cup starter liquid (reserved from previous batch or purchased kombucha).
- Cover loosely: Cover jar with coffee filter or cheesecloth secured with rubber band. This allows airflow while preventing dust and insects.
- Ferment: Place in dark, warm location (68-85°F / 20-29°C). Avoid direct sunlight and vibration. Ferment 7-14 days depending on temperature and taste preference.
- Taste test: After 7 days, taste daily using a clean spoon. Kombucha is ready when pleasantly tangy with residual sweetness. Longer fermentation = more vinegary, more acidic.
SCOBY appearance: A new layer (pellicle) will form on the surface as kombucha ferments. This is normal. You can keep both the original and new SCOBY layers, or peel away excess pellicle before bottling.
Second Fermentation (3-7 days, optional):
- Bottle kombucha: Strain finished kombucha through fine mesh or cheesecloth into clean glass bottles.
- Add flavoring (optional): Add juice (ginger, lemon, berry), herbs, or spices before capping.
- Seal tightly: Cap bottles and leave at room temperature for 3-7 days for carbonation and flavor infusion.
- Refrigerate: After second fermentation, chill bottles to slow carbonation and prepare for serving.
- Serve: Pour over ice and enjoy. Store in refrigerator for up to 1 month.
Maintaining SCOBY for Next Batch:
- Reserve 1-2 cups of finished kombucha as starter liquid for next batch.
- Store SCOBY + starter liquid in a glass jar at room temperature between batches (continuous brewing) or refrigerate for longer storage.
- If taking a break from brewing, store SCOBY in starter liquid in fridge for up to 6 months.
Health Benefits
- Probiotics: Live beneficial bacteria (acetobacter, lactobacillus) support gut health and digestion.
- Digestive enzymes: Fermentation produces enzymes that improve nutrient absorption and support digestion.
- Detoxification support: Kombucha contains glucaric acid and other compounds that may support natural detox pathways.
- Lower sugar than soda: Fermentation consumes most added sugar, making kombucha lower-calorie than conventional beverages.
- Natural energy: Kombucha contains trace amounts of caffeine (much less than original tea) and B vitamins that provide gentle energy lift.
Troubleshooting
- Mold growth: White fuzzy mold on surface = discard batch. Blue or green mold = contamination. Brown spots or yeast strings = normal.
- Too vinegary: Reduce fermentation time or lower temperature (cooler = slower fermentation).
- Too sweet: Extend fermentation time or increase temperature slightly (warmer = faster fermentation).
- No carbonation in second fermentation: Ensure bottles are sealed tightly and bottles contain adequate sugar/juice for yeast to produce CO2.
- SCOBY won't form new layer: Ensure adequate starter liquid, proper temperature, and patience—new pellicles can take 1-2 weeks to form.
Flavor Variations
- Ginger & Lemon: Add fresh ginger slices and lemon juice during second fermentation
- Berry Blend: Infuse with strawberry, blueberry, or raspberry juice
- Hibiscus: Brew hibiscus flower tea and add to kombucha during second fermentation
- Mint & Cucumber: Muddle fresh mint and cucumber slices for refreshing summer kombucha
- Turmeric & Black Pepper: Add anti-inflammatory spices for wellness shot variation