Tea, Sugar & Flavoring

Black Tea

The standard base tea — full oxidation gives the culture nitrogen, tannin and a reliable starting point.

Black Tea — original illustration

Original illustration — a generic example of this tool, not a specific product.

Specifications

Category
Tea, Sugar & Flavoring
Type
Plain black tea: Ceylon, Assam, Darjeeling or a standard blend
Dose
Roughly 1–2 tsp loose-leaf, or 2–4 tea bags per gallon
Steep
5–10 minutes in water just off the boil
Sugar ratio
About 1 cup (200–225 g) of sugar per gallon of tea
Avoid
Smoked teas, oil-flavoured blends, instant powder, herbal-only blends
Caffeine
Roughly 40–70 mg per 8 fl oz of brewed tea
Typical batch size
4–8 g (1–2 tsp) per gal of finished tea

Black Tea

The standard base tea — full oxidation gives the culture nitrogen, tannin and a reliable starting point.

Black tea is the traditional base for kombucha and the easiest to get consistent results with. Full oxidation gives it more tannin and more of the nitrogen compounds the culture uses to build cellulose, so the pellicle forms readily and fermentation stays predictable. Plain, unflavoured loose-leaf or bagged black tea is what you want — not smoked, not flavoured with oils, not instant.

tea base tannin
Best for
First Fermentation
Batch size
4–8 g (1–2 tsp) per gal of finished tea

Applicable brewing stages

  • First Fermentation
  • Second Fermentation
  • Flavoring
  • Bottling
  • Cleaning & Testing

A highlighted stage means this tool has a direct role at that point in the process. Ticking several stages is normal — a thermometer, for example, is useful during both the first and second fermentation.

Safety notes

Kombucha made with black tea contains caffeine and a small amount of alcohol as a normal product of fermentation. Both are usually present in modest amounts but neither is zero. Children, pregnant or breastfeeding people, and anyone advised to limit caffeine or alcohol should speak to a healthcare professional before drinking kombucha. Do not drink kombucha as a substitute for water or rehydration.

Practical guidance

  • Use the same tea and the same dose every batch — this is most of what makes a brew repeatable.
  • Do not use flavoured or smoked teas for the first fermentation; oils can inhibit the culture and the smokiness builds.
  • Tea bags are fine; just remove them before they turn the brew bitter.
  • Steep strong: you want real tea strength, since the sugar and the culture will both change the flavour.

Please read before you brew

This page is educational reference material, not professional brewing, food-safety or medical advice. Equipment handling, hygiene practice and local rules vary, and nothing here guarantees a particular brewing result.

  • Home brewing rules differ by country, state, province and municipality, and they change over time. Check your own local requirements — including any permit, licence, volume limit or minimum age — before you brew, bottle or share what you make.
  • Use food-grade equipment only. Vessels, bottles, tubing and utensils that were not made for food or drink may release unwanted compounds or shelter microbes.
  • Work in a well-ventilated space, keep hot liquids away from children and pets, and follow the manufacturer's instructions for every appliance you use.
  • Bottles under pressure can fail. Use bottles designed for carbonated drinks, do not over-prime, and refrigerate once the carbonation is right.
  • For anything involving gas pressure, electricity, high heat, chemical cleaners or acids, consult a qualified professional.

Finished kombucha contains trace alcohol and caffeine. It is not suitable for children, and anyone who is pregnant, breastfeeding, immunocompromised, diabetic or taking medication should speak to a healthcare professional before drinking it. Kombucha is a food, not a medicine, and it does not treat, cure or prevent any disease.

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