Quick Answer
Assam tea is black tea named after the Assam region of India, made from the large-leaf Assam tea plant (Camellia sinensis var. assamica) and grown mainly in the Brahmaputra Valley. English Wikipedia describes its flavor as brisk and malty with a bright color, which is why it is often used in breakfast tea blends. Its strong flavor holds up well against milk and sugar, making it a common base for milk tea and bubble milk tea.
Where Assam Tea Comes From
Summarized from the English Wikipedia article “Assam tea”:
| Item | Details |
|---|---|
| Name | Named after its origin, Assam, India |
| Tea plant | Camellia sinensis var. assamica (large-leaf Assam variety) |
| Growing region | Brahmaputra Valley, with clay soils rich in alluvial nutrients |
| Climate | Cool, dry winters and hot, humid rainy seasons |
| Discovery | In 1823 Scottish trader Robert Bruce saw the Singpho people using the plant and obtained samples |
| Flavor | Brisk, malty, bright color |
Black tea from Taiwan’s Sun Moon Lake also has roots in Assam: Chinese Wikipedia records that large-leaf tea plants were introduced from Assam during Japanese rule, laying the foundation for Sun Moon Lake black tea, and the mother plant of Ruby (Taiwan Tea No. 18) is Burmese large-leaf Assam; see Taiwan Ruby Black Tea.
Why Is Assam Good for Milk Tea?
- Strong flavor: the tea still comes through after creamer or fresh milk is added.
- Deep color: gives milk tea an attractive color.
- Consistent flavor: suits large-batch brewing and keeps every cup the same.
This is also why Wikipedia notes that Assam is often used in breakfast and Irish breakfast teas: a strong base that takes milk well.
How to Use Assam in Bubble Tea
| Drink | Recipe base |
|---|---|
| Bubble milk tea | Assam + non-dairy creamer or fresh milk + tapioca pearls |
| Fresh milk tea | Assam + fresh milk |
| Black tea latte, cheese foam black tea | Assam + milk foam |
| Lemon black tea | Assam + lemon juice syrup |
Follow the package for brewing temperature, time and leaf amount, then test in store and write it into your SOP. For creamer vs fresh milk, see What Is Non-Dairy Creamer?
Tang Sugar Assam Black Tea Products
Tang Sugar supplies Assam black tea leaves (600 g bags), Assam filter-free bags and Assam brewing bags, so you can brew whole leaves, skip straining, or use a tea espresso machine. See our tea products or request samples.
Products in this article
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FAQ
What is Assam black tea?
Assam is black tea named after the Assam region of India and made from the large-leaf Assam tea plant, with a strong, malty flavor.
Where is Assam tea grown?
Mainly in the Brahmaputra Valley in Assam, India.
Why is Assam used for bubble milk tea?
Assam has a strong flavor and deep color, so the tea still stands out after milk and sugar are added, which suits milk tea.
How is Assam related to Taiwan’s Ruby black tea?
Ruby (Taiwan Tea No. 18) was bred by crossing Burmese large-leaf Assam (mother) with Taiwan wild mountain tea (father).
Is Assam tea the same as English breakfast tea?
Not exactly. English breakfast tea is a blend, and Assam is a single-origin black tea that is often used in breakfast blends because of its strong, malty flavor.
How do I choose Assam tea for a bubble tea shop?
Shops usually buy commercial packs from tea suppliers. Choose by equipment: whole leaves for traditional brewing, filter-free bags to skip straining, and brewing bags for tea espresso machines. Tang Sugar supplies Assam leaves (600 g bags), filter-free bags and brewing bags; see our tea products or request samples.
How do you brew Assam tea for milk tea?
Temperature, time and leaf amount depend on each product’s package instructions. Brew a test batch, adjust for sweetness, ice and milk, then write the settings into your SOP. For tea bag formats, see Filter-Free Tea Bags vs Brewing Bags.
Does Assam tea contain caffeine?
Yes. Assam is a black tea made from tea plant leaves and contains caffeine; the amount depends on the leaves, dose and steeping time. See How Much Caffeine Is in Bubble Tea?
Further Reading
- Taiwan Ruby Black Tea (No. 18)
- What Is Ceylon Black Tea?
- Which Tea Leaves Are Best for Milk Tea?
- What Is Earl Grey Tea?
- A History of Taiwanese Tea
Sources
- Wikipedia: Assam tea
- Chinese Wikipedia: Taiwanese tea (in Chinese)
- Tang Sugar product list (March 2026 edition)
