How tea is made: from leaf to cup

Making tea is a lot like making cheese. You start with one raw ingredient — milk for cheese, leaves from the Camellia sinensis plant for tea — and depending on how you process it, you get something completely different. Fresh mozzarella or aged cheddar. Delicate white tea or smoky Lapsang Souchong. The plant is the same every time. The processing is what changes everything.

This idea catches most people off guard. Green tea, oolong (乌龙茶, wūlóng chá — literally "dark dragon"), black tea — called red tea (红茶, hóngchá) in China because of its reddish brew colour — and pu-erh all come from the same species. The leaves just go through different steps after they're picked.

What follows is a walk through those steps, roughly in the order they happen. Not every tea goes through every step, and the sequence changes depending on the type. But once you see how each process shapes the final cup, a lot of things start to make sense — why green tea tastes grassy, why oolong is floral, why aged pu-erh tastes like damp forest floor.

One of our customers, Eli, put it simply after visiting our Tea Bar: "She taught me about different ways to serve the tea — I had no idea that there was more than one!" Most people don't, until they see how much work goes into each cup.

From fresh leaf to your cup: the core steps

Picking: it starts with what you pluck

Tea makers talk about picking standards the way wine growers talk about grape selection. The most common standard is "one bud, one leaf" (一心一叶, yì xīn yī yè) — a single unopened bud plus the first young leaf below it. Some teas use only buds. Others use more mature leaves on purpose.

Why this matters: younger buds contain more amino acids (which give sweetness and aroma), while more mature leaves contain more polyphenols (which give body and structure). Teas made primarily from buds tend to be more delicate (细致, xìzhì). Teas made from mature leaves tend to be more robust (粗犷, cūguǎng). Neither is better — they're suited to different styles.

Common mistake: Assuming bud-only teas are always "higher quality." Silver Needles, made from buds alone, is delicate and subtle. But oolong teas deliberately use mature, thick leaves because those leaves can withstand the heavy processing that creates their layered flavour. Different goals, different picks.

Withering (萎凋, wěidiāo): letting moisture go

After picking, most teas go through withering — spreading the fresh leaves out and letting moisture evaporate slowly through the leaf's pores. This isn't just drying. As water leaves the cells, grassy, raw-plant aromas fade and floral or fruity notes begin to develop.

The pace matters. If moisture escapes too fast (失水, excessive evaporation), the tea maker loses control — the leaves dry out before their flavour compounds have time to develop. Too slow (积水, insufficient evaporation), and the edges start oxidising unevenly while the centres stay wet.

Sun withering can produce what tea makers call "high fragrance" (高香, gāoxiāng) — a bright, lifted scent you often find in good oolong. Indoor withering gives the maker more control but less intensity. For white tea, withering is essentially the entire process — no frying, no rolling, just this gentle loss of moisture followed by drying. That's why white tea tastes so clean and understated. Liam R, who tried our Gong Mei White for the first time, described it this way: "Gong Mei's fresh and delicate flavor makes me feel like I'm laying on a grass field on a sunny day."

Kill-green (杀青, shāqīng): stopping the clock

Here's where things get decisive. Kill-green uses heat to deactivate the oxidation enzymes in the leaf, locking in the tea's current state. Think of it like blanching vegetables — you're using heat to stop a chemical process and preserve colour and freshness.

There are two main approaches:

• Pan-firing (炒青, chǎoqīng): Tossing leaves in a hot wok. This is how most Chinese green teas are made. It creates a chestnut-like aroma and a slightly yellowish-green liquor. Dragon Well (Longjing) is a classic pan-fired green tea.
• Steaming (蒸青, zhēngqīng): Exposing leaves to steam. This is the Japanese method. It preserves more chlorophyll and amino acids, giving you a brighter green colour and a seaweed-like umami taste. Matcha and sencha are both steamed.

For green tea, kill-green happens early — right after picking or minimal withering — which is why green tea keeps that fresh, plant-like character. Amelia F had always avoided green teas, thinking they'd be bitter. After trying a sample at Salamanca Market, she told us: "This tea has zero bitterness." That bitterness she'd experienced before? Likely water that was too hot, not a flaw in the tea itself.

Common mistake: Blaming green tea for being bitter. Bitterness in green tea usually comes from brewing with boiling water. The amino acids that give green tea its sweetness break down at high temperatures, while bitter compounds extract faster. Most green teas do best at 70-80°C.

Rolling (揉捻, róuniǎn): shaping the leaf, shaping the taste

Rolling does three things at once: it breaks open leaf cells (so the tea releases flavour more easily when you brew it), shapes the leaf into its final form (flat, twisted, balled), and — less obviously — affects how the tea tastes.

Light rolling (轻揉, qīngróu) produces tea with a "light, lifted" character (清扬, qīngyáng). Heavy rolling (重揉, zhòngróu) produces tea with a "deep, grounded" character (低沉, dīchén). This is why a lightly rolled green tea feels bright and airy in your mouth, while a tightly balled Dong Ding Oolong feels rounder and more concentrated.

The direction and method of rolling also determine the tea's shape. Pressing back and forth creates the flat shape of Dragon Well. Rolling in circles creates spirals like Biluochun. Wrapping in cloth and kneading creates the tight balls of Taiwanese oolong.

The processes that make each tea type different

Oxidation (氧化, yǎnghuà): the single biggest flavour factor

If there's one process that explains why teas taste so different from each other, it's oxidation. When leaf cells are damaged (through withering, rolling, or deliberate bruising), enzymes inside the leaf react with oxygen. The longer and more completely this happens, the further the tea moves from fresh and grassy toward fruity, sweet, and malty.

Think of it as a spectrum:

• Green tea: 0-5% oxidation. Kill-green happens almost immediately, so the leaf stays close to its natural plant flavour.
• White tea: 5-10%. Very light, natural oxidation during withering.
• Yellow tea: 5-15%. Slightly more than green, with an added wrapping step.
• Oolong: 15-85%. This range is enormous — a light oolong can taste closer to green tea, while a heavy oolong can taste closer to black tea.
• Black tea (红茶, hóngchá): 85-100%. Fully oxidised. The polyphenols convert into compounds that give red colour, sweetness, and body.

Less oxidation means flavour stays closer to the living plant — vegetal, grassy, marine. More oxidation pushes flavour toward fruit, caramel, and malt. This is also why fully oxidised black tea tends to be sweeter than green tea: oxidation breaks polyphenols down into sugars.

Angus, one of our customers, tried our Lapsang Souchong — a fully oxidised and pine-smoked black tea from the Wuyi Mountains — and described it as "reminding me of smoked beef jerky. As far as tea goes this is an umami bomb!" That intense, savoury character comes from full oxidation combined with traditional smoking over pinewood.

Common mistake: Using "oxidation" and "fermentation" interchangeably. In tea, oxidation is an enzyme-driven reaction that needs oxygen (what happens in oolong and black tea). Fermentation is a microbe-driven process (what happens in pu-erh, driven by yeast and bacteria). They're completely different chemistry, even though the tea industry often mixes up the terms.

Make-green (做青, zuò qīng): the soul of oolong

Oolong has its own step that no other tea type uses: make-green. The tea maker alternates between gently tossing or shaking the withered leaves (摇青, yáoqīng) and letting them rest (静置, jìngzhì). Each round of tossing bruises the leaf edges, causing them to oxidise and turn red, while the centres stay green.

This is where the classic oolong description "three parts red, seven parts green" (三红七绿, sān hóng qī lǜ) comes from. By controlling how many rounds of tossing, how hard, and how long the rest periods are, the tea maker controls exactly how much oxidation happens. This gives oolong its layered complexity — floral, fruity, and creamy notes woven together in a single cup.

Roasting (焙火, bèihuǒ): adding depth

Some teas get roasted after their primary processing. Roasting shifts the tea's character from fresh and cool toward warm and deep. Without roasting, a tea tastes like a stir-fry — clean and bright. With roasting, it tastes more like a slow braise — rich, complex, with caramelised edges.

Wuyi rock teas like Big Red Robe (Da Hong Pao) are known for heavy charcoal roasting, which gives them their distinctive toasty, mineral character. In Traditional Chinese Medicine terms, roasting can change a tea from cooling (凉性) to warming (温性) — which is why heavily roasted oolongs are often recommended for colder months or people with sensitive stomachs.

Pile fermentation (渥堆, wò duī): pu-erh's secret

Unlike every other process we've covered, pile fermentation involves actual microorganisms — yeast, bacteria — breaking down tea leaves in a warm, humid pile for anywhere from 24 hours to 45 days. This is genuine fermentation, the same kind that happens in cheese-making or sourdough bread.

The result is a tea with thick, mellow body (厚重醇和, hòuzhòng chúnhé), earthy depth, and none of the astringency you find in less processed teas. Our Tasmanian Lavender Pu-erh, awarded at the 2025 Royal Tasmanian Fine Food Awards, blends this earthy fermented base with Tasmanian lavender — an example of how traditional Chinese processing meets local Australian ingredients.

It's worth noting that only ripe pu-erh (熟普, shú pǔ) goes through pile fermentation. Raw pu-erh (生普, shēng pǔ) is closer to a sun-dried green tea that slowly changes over years of natural aging.

Wrap-yellowing (闷黄, mèn huáng): the rarest step

Yellow tea has one unique step: after kill-green, the leaves are wrapped in cloth or paper and left in a warm, humid environment — sometimes for up to three days. This gentle process removes some of green tea's grassiness and adds nutty, velvety qualities. Yellow tea is the rarest of all Chinese tea types, and many teas sold as "yellow tea" today haven't actually gone through proper wrap-yellowing.

Tips from our Tea Bar

I find that once people understand processing, they start choosing tea differently. Instead of asking "What's a good tea?" they start asking more useful questions — "I want something floral but not grassy" or "I like smoky flavours."

Here are a few starting points based on the processing steps above:

• If you want to taste the difference between pan-fired and steamed kill-green, try a Dragon Well next to a Japanese sencha. Same plant family, same colour category, completely different flavour because of that one processing choice.
• If you've found green tea too bitter, try brewing it at 70-80°C instead of boiling water. The processing is fine — it's the brewing that needs adjusting.
• If you want to understand oxidation, try an oolong and a black tea side by side. Oolong gives you partial oxidation (floral, layered); black tea gives you full oxidation (sweet, bold).

At our Tea Bar in Salamanca Art Centre, Hobart, we often walk people through these comparisons. It's the fastest way to understand how processing shapes what ends up in your cup.

Teas mentioned in this article

• Dragon Well (Long Jing) — pan-fired green tea from Hangzhou
• Silver Needles — bud-only white tea from Fuding
• Gong Mei White Tea — fuller-bodied white tea
• Dong Ding Oolong — classic Taiwanese ball-shaped oolong
• Big Red Robe (Da Hong Pao) — roasted oolong from Wuyi Mountains
• Lapsang Souchong — pine-smoked black tea from Wuyi Mountains
• Tasmanian Lavender Puerh — ripe pu-erh with Tasmanian lavender

Published: March 2026 | Last updated: March 2026

Frequently asked questions

Is oxidation the same as fermentation in tea?

No. Oxidation is an enzyme-driven reaction where oxygen interacts with compounds in the tea leaf — this is what happens during oolong and black tea production. Fermentation is a microbe-driven process involving yeast and bacteria, and it's what gives pu-erh tea its distinctive earthy character. The tea industry often uses "fermentation" loosely to mean oxidation, but the two are different chemical processes.

Do all teas come from the same plant?

Yes. Green tea, white tea, oolong, black tea, and pu-erh all come from the Camellia sinensis plant. The differences in colour, flavour, and aroma come from how the leaves are processed after picking — not from different plants. Herbal "teas" like chamomile or rooibos come from other plants entirely and are technically tisanes.

Does green tea always have less caffeine than black tea?

Not necessarily. There's no reliable rule linking tea type to caffeine content. The caffeine level in a cup of tea depends more on the specific cultivar (plant variety) and growing conditions than on processing. A bud-heavy green tea can have more caffeine than a mature-leaf black tea.

Is white tea "unprocessed"?

No. All real tea from the Camellia sinensis plant goes through processing. White tea goes through withering and drying — it's the least processed tea type, but it is still processed. The idea that white tea is "raw" or "natural" in the sense of being untouched is a common misconception.

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If you're in Hobart, drop by our Salamanca Tea Bar — we'll brew whatever interests you, no pressure to buy. You'll also find us at Salamanca Market every Saturday morning.