Ceylon Oolong Tea: How It Is Made, Flavour and Brewing

Key takeaways

Oolong is partly oxidised, so it sits between green and black tea.
Bruising the leaf edges, then fixing at the right moment, creates oolong's complex aroma.
Ceylon oolong is a small-scale speciality, often bright, fruity and floral.
Brew Western style at 85–95°C for 3–5 minutes, or gongfu style with short, repeated infusions.
Every Hakgala tea follows one journey: sourcing, tasting, packing in Sri Lanka, checks and delivery.

Introduction

Oolong is the tea between green and black. Its leaves are partly oxidised: more than green tea, less than black tea. This middle path gives oolong a remarkable range of flavours, from light, floral and creamy to rich, roasted and fruity, and makes it one of the most complex teas in the world.

Oolong is traditionally associated with China’s Fujian province and with Taiwan, but a small number of Sri Lankan producers now make oolong from Ceylon leaf. The result combines oolong craftsmanship with the character of Sri Lanka’s tea bushes and climate: bright, aromatic and full-bodied.

Hakgala, the Ceylon tea brand of Raiden (Pvt) Ltd, completes its four-tea range with an oolong tea, alongside black, green and white teas. Dsigngo Marketing, which manages the Hakgala brand, presents oolong as the tea for explorers: drinkers who already enjoy black or green tea and want to discover something new. Hakgala oolong is a medium-oxidised Ceylon oolong in the twisted-leaf style, with bright, fruity and honeyed notes.

This guide explains what oolong is, how partial oxidation works, how oolong is made step by step, how Ceylon oolong differs from Chinese and Taiwanese oolongs, and how to brew it, both Western style and in the traditional gongfu style. It also explains how Hakgala tea travels from the estate to your cup.

What is oolong tea?

All four Hakgala teas come from the same plant, Camellia sinensis. Oolong’s character comes from partial oxidation. The leaves are bruised to start oxidation at their edges, and then heated to stop it part-way.

Depending on the style, the level of oxidation in oolong can range widely, from lightly oxidised teas close to green tea to heavily oxidised teas close to black tea. Ceylon Green Tea: How It Is Made and Brewed shows the full oxidation scale for all four teas.

Lightly oxidised oolongs are green-gold in the cup, with floral, creamy and fresh notes.
Medium oolongs are amber, with fruity, honeyed notes.
Heavily oxidised or roasted oolongs are darker amber to red-brown, with notes of stone fruit, caramel, toasted nuts or wood.

Oolong leaves are also shaped in two main ways: rolled into tight balls, which slowly unfurl in hot water, or twisted into long, dark strips. Many Ceylon oolongs are made in the twisted-strip style.

The name “oolong” comes from the Chinese wulong, often translated as “black dragon”, a reference to the long, dark, twisted leaves of some traditional styles.

A short history of oolong

Oolong tea developed in China several centuries ago, most likely in the Wuyi Mountains and the Anxi area of Fujian province. Tea makers there discovered that bruising the leaves and letting them oxidise partly before heating created aromas that neither green nor black tea could match. Over time, each district developed its own style, and some became famous across China, such as Tieguanyin and the “rock teas” of the Wuyi Mountains.

In the nineteenth century, tea makers from Fujian brought oolong to Taiwan, where it became a national speciality. Taiwan’s high mountain oolongs and Oriental Beauty are now among the most sought-after teas in the world.

Sri Lanka’s tea industry grew up making black tea for British and later global markets, so oolong arrived much later. In recent decades, some Sri Lankan producers have experimented with oolong methods, adapting them to local tea bushes and climate. Their teas are made in small batches and are often sold as speciality teas, both at home and abroad. Ceylon oolong is still young, which makes it exciting: each producer’s style is distinctive, and the category is still being defined.

How oolong tea is made

Oolong has the most complex process of the four teas. It needs great skill, because the tea maker must control oxidation precisely.

Oolong tea process

1PluckingBud with three to five leaves
2WitheringIn sun or warm air, then indoors
3BruisingLeaves tossed to bruise their edges
4Partial oxidationRests between tossings
5FixingHeat stops oxidation part-way
6RollingTwisted strips or rolled balls
7Drying & roastingSome styles are roasted

Figure 1: How oolong tea is made. Bruising and partial oxidation give oolong its complex flavour.

1. Plucking

Oolong is usually made from slightly more mature leaf than green or white tea: often three to five leaves with a bud. More mature leaves can withstand the repeated handling of the oolong process and develop deeper aromas.

2. Withering

The leaves are withered in the sun or in warm air, then indoors. They lose moisture, soften and begin to change chemically.

3. Bruising (tossing or shaking)

This is the defining step of oolong making. The leaves are tossed in bamboo baskets or rotating drums, which bruises their edges and breaks cells along the rim. Oxidation starts in these bruised areas. The tea maker repeats the cycle of tossing and resting several times over many hours, smelling the leaves to judge their progress.

4. Partial oxidation

Between tossings, the leaves rest so that oxidation can continue. Traditionally, a well-made oolong leaf is reddish at the edges and green in the centre. The tea maker decides when the leaves have reached the right level of oxidation for the style.

5. Fixing (“kill-green”)

The leaves are heated, usually in a hot pan or drum, to stop oxidation at exactly the right point. This step locks in the aroma.

6. Rolling and shaping

The softened leaves are rolled into balls or twisted into strips. Rolling releases flavour and gives the finished tea its shape.

7. Drying and roasting

The tea is dried to make it stable. Some oolongs are then roasted, sometimes several times over days or weeks, which adds toasty, caramel or nutty notes and a darker colour.

Ceylon oolong compared with Chinese and Taiwanese oolong

China and Taiwan have centuries of oolong tradition and hundreds of named styles. Famous examples include Tieguanyin from Fujian, Wuyi rock teas, and Taiwan’s high mountain oolongs and Oriental Beauty. Ceylon oolong is a much newer speciality, and Sri Lankan producers often develop their own styles.

Feature	Chinese and Taiwanese oolongs	Ceylon oolong
Tradition	Centuries old, many named styles	A recent, small-scale speciality
Tea bushes	Mostly sinensis types and special cultivars	Sri Lankan bushes, often bred for black tea
Shape	Rolled balls and twisted strips	Often twisted strips; some rolled styles
Flavour	From creamy and floral to roasted and mineral	Often bright and fruity, with honey and floral notes and good body
Availability	Widely available	Limited quantities from a few producers

Because Sri Lankan oolong is produced in small quantities, it is still unfamiliar to many tea drinkers. For a brand like Hakgala, that is an opportunity: an oolong from Ceylon is a talking point, and a way to show the range and craft of Sri Lankan tea beyond black tea.

The flavour of oolong

Oolong is prized for its aroma and its long, changing finish. Professional tasters often describe it with words such as:

Floral: orchid, lilac, jasmine or gardenia, especially in lighter oolongs.
Fruity: peach, apricot, lychee or baked apple, especially in medium oolongs.
Sweet: honey, caramel or brown sugar.
Roasted: toasted nuts, grain, cocoa or wood in heavily roasted styles.
Creamy or buttery: in some lightly oxidised, rolled oolongs.

One of the joys of oolong is that the flavour changes from one brew to the next. The first infusion may be light and floral, the second fuller and fruitier, and later infusions sweeter and softer.

How to brew oolong tea

Western style (in a mug or teapot)

Heat fresh water to about 85–95°C. Use the lower end for light, green-style oolongs and the higher end for darker, roasted oolongs.
Use about 2–3 grams of tea (one heaped teaspoon of twisted leaf) for each 200–250ml cup.
Brew for 3–5 minutes.
Remove the leaves, but keep them: oolong can be brewed several times. Add a minute to each brew.
Drink it plain. Oolong is not usually taken with milk.

Gongfu style (the traditional method)

Gongfu brewing uses a small teapot or a lidded bowl (gaiwan), a lot of leaf and very short brews. It brings out the changing flavours of oolong.

Warm the pot or gaiwan with hot water.
Add about 5–7 grams of oolong for a 100–150ml vessel.
Pour hot water (about 90–95°C) over the leaves and discard it after a few seconds. This “rinse” wakes up the leaves.
Brew for 20–30 seconds, then pour all the tea into small cups.
Repeat, adding 5–10 seconds each time. A good oolong can give six or more infusions.

Iced oolong

Oolong makes excellent iced tea. Brew it at double strength for 4–5 minutes and pour it over ice, or cold-brew 8 grams of oolong in a litre of cold water in the fridge for 8–12 hours. Iced oolong has a natural sweetness, so it needs little or no sugar.

Ceylon White Tea: Silver Tips, Golden Tips and How to Brew Them includes a chart that compares water temperatures and brewing times for all four Hakgala teas.

Pairing oolong with food

Oolong is one of the most food-friendly teas, because its flavour sits between the freshness of green tea and the strength of black tea. Some pairings to try:

Light, floral oolongs suit seafood, steamed dishes, salads, fresh fruit and light pastries. Their floral notes lift delicate flavours without overpowering them.
Medium, fruity oolongs suit chicken, rice dishes, mild curries, cheese and fruit tarts.
Dark, roasted oolongs suit grilled meat, roasted vegetables, nuts, dark chocolate and caramel desserts. Their toasty notes match browned and roasted flavours.

In Sri Lanka, a medium oolong goes well with lightly spiced dishes and with traditional sweets such as kokis or kavum, where its fruitiness balances the richness. For restaurants, oolong offers a simple way to create a tea pairing menu without relying on alcohol.

Oolong, caffeine and wellbeing

Oolong contains caffeine, generally between green and black tea, though the amount varies with the leaf and brewing. It also contains a mix of catechins and the theaflavins formed during oxidation. Oolong has been studied for possible effects on metabolism, but the evidence is limited and often based on extracts. Hakgala makes no health or weight-loss claims for its oolong, or for any of its teas. Oolong is best enjoyed for its flavour and aroma.

How to judge the quality of oolong

Dry leaf: even in shape and colour, with no excessive dust, stalk or broken leaf.
Aroma: clean and expressive, whether floral, fruity or roasted. Avoid teas that smell flat, smoky in an unpleasant way, or musty.
Liquor: clear and bright, from golden to amber.
Infused leaf: the leaves should open fully. In many styles you can see red-brown oxidised edges and a greener centre.
Re-brewing: a good oolong gives several pleasant infusions. A tea that is exhausted after one brew is usually lower quality.

From estate to cup: how Hakgala works

Hakgala teas, including its oolong, follow one quality journey. Each stage has a clear owner.

Hakgala: estate to cup

1SourcingRaiden (Pvt) Ltd
2Tasting & selectionEach lot checked against the standard
3Blending or single lotConsistency or character
4Packing in Sri LankaSealed, coded packs
5Quality checkWeight, seal and labelling
6Marketing & deliveryDsigngo Marketing and Raiden

Figure 2: How Hakgala teas travel from the estate to the cup, and who is responsible at each stage.

1. Sourcing

Raiden (Pvt) Ltd, the brand owner, grows every Hakgala tea on its own plantations in Sri Lanka. For a speciality such as oolong, this means small batches made by skilled tea makers.

2. Tasting and selection

Each lot is tasted and checked against Hakgala’s standard for appearance, aroma and cup before it is accepted.

3. Blending or single-lot packing

Black tea may be blended for a consistent taste year-round. Speciality teas such as white tea and oolong are usually packed as single lots to keep their character.

4. Packing in Sri Lanka

The tea is packed in sealed packs in Sri Lanka, with batch codes and best-before dates. Packing at source is also a requirement for using the Sri Lanka Tea Board’s Lion logo.

5. Quality check

Packed tea is checked for weight, seal and labelling before release. Hakgala is produced under local and international certifications for quality and food safety.

6. Marketing and delivery

Dsigngo Marketing presents Hakgala to customers through packaging, photography, the website and online shop, social media and trade marketing. Raiden manages orders and delivery to homes, shops, hotels, offices, distributors and importers.

This clear structure means every Hakgala customer, whether a household or an importer, has one standard of tea and one point of contact.

Oolong for gifts, hotels and tea menus

Because Ceylon oolong is rare, it suits premium uses:

Tea menus in hotels, restaurants and cafés, alongside a classic Ceylon black tea and a green tea.
Tea tasting experiences for tourists, comparing all four Hakgala teas side by side.
Gift sets that include oolong as the “discovery” tea.
Iced oolong as a premium alcohol-free drink.

Dsigngo Marketing designs Hakgala gift packs and menu materials in-house. See the Product Packaging Design & Print page for options.

An example in practice

The following example is illustrative and does not describe a real client.

A tourist hotel near Kandy wants to offer guests a 45-minute “four teas of Ceylon” tasting in its lounge. It wants a simple, educational experience that staff can run without specialist training.

Dsigngo Marketing builds the experience around the four Hakgala teas. Staff serve white tea first, then green, then oolong, then black, so guests taste the oxidation scale from lightest to strongest. A printed placemat shows the oxidation scale and the brewing chart, and staff brew the oolong gongfu style in front of guests to show how its flavour changes with each infusion. Guests can buy a four-tea gift set from the hotel shop at the end.

The result is a memorable guest experience, a new retail line for the hotel, and a steady customer for Hakgala.

Frequently asked questions

Is oolong a green tea or a black tea?

Neither. Oolong is partly oxidised, so it sits between green and black tea. Light oolongs are closer to green tea; dark, roasted oolongs are closer to black tea.

Does Sri Lanka produce oolong tea?

Yes, in small quantities. A few Sri Lankan producers make oolong from Ceylon leaf, often in a twisted-leaf style with bright, fruity and floral notes.

How many times can I brew oolong?

Several. Western style, two or three brews are common. Gongfu style, with more leaf and short brews, a good oolong can give six or more infusions.

Should I add milk to oolong?

Usually not. Milk hides oolong’s delicate floral and fruity notes. Enjoy it plain, hot or iced.

Does oolong help with weight loss?

Hakgala makes no weight-loss or health claims for oolong. Some studies have looked at oolong and metabolism, but the evidence is limited. Enjoy oolong for its flavour.

How should I store oolong tea?

In an airtight container away from light, heat, moisture and strong smells. Lightly oxidised oolongs are best within a few months of opening; roasted oolongs keep their character longer.

Conclusion

Oolong is the most complex of the four Ceylon teas. Bruising, partial oxidation, fixing, rolling and sometimes roasting create a tea with floral, fruity, honeyed or toasty notes that changes with every infusion. Ceylon oolong is still a rare speciality, but it shows the craft and range of Sri Lankan tea beyond its famous black tea.

Hakgala oolong completes a four-tea range of black, green, white and oolong teas, owned by Raiden (Pvt) Ltd and marketed by Dsigngo Marketing. Every tea follows one journey, from sourcing and tasting to packing in Sri Lanka, so every cup meets one standard.

Want to taste Hakgala oolong, or create a four-tea experience for your guests? Contact Dsigngo Marketing for samples and product details.

Discover Hakgala oolong