No. Oolong is not a type of green tea. Oolong is its own category of tea. It is partly oxidized, which places it between green tea (not oxidized) and black tea (fully oxidized).
That in-between step is what gives oolong its range. A light oolong can taste fresh and floral, almost like a green tea. A darker, roasted oolong can taste warm and toasty, closer to a black tea. Most sit somewhere in the middle, with a smooth body and a naturally sweet finish.
In Taiwan, where all Mio Tea teas come from, oolong is the tea people know best. Here is what makes it different, and how to enjoy it at home.
Oolong at a glance
|
|
Green tea |
Oolong tea |
Black tea |
|---|---|---|---|
|
Oxidation |
None |
Partial (roughly 10–70%) |
Full |
|
Leaf colour |
Green |
Green to dark brown |
Dark brown to black |
|
Cup colour |
Pale green-yellow |
Pale gold to amber |
Red-amber |
|
Flavour |
Fresh, grassy, vegetal |
Floral, creamy, fruity or toasty |
Malty, rich, bold |
|
Caffeine |
Usually lower |
Moderate |
Usually higher |
|
Re-steeps |
2–3 |
3–5 or more |
1–3 |
All three come from the same plant, Camellia sinensis. The difference is in how the leaves are processed after picking.
What makes oolong different: oxidation
Once a tea leaf is picked and bruised, it starts reacting with oxygen and slowly darkens, a bit like a cut apple turning brown. This is called oxidation (often called "fermentation" in tea, though no microbes are involved). How far the tea maker lets it go decides the type of tea.
- Green tea: heated soon after picking to stop oxidation. The leaf stays green and tastes fresh.
- Oolong tea: the leaves are gently tossed and rested again and again, so only part of the leaf oxidizes. Then heat stops the process. This step takes skill and patience, and it is where oolong's floral and fruity aromas come from.
- Black tea: the leaves are rolled and left to oxidize fully, giving a dark leaf and a rich, malty cup.
Many oolongs are also roasted after shaping. A light roast keeps the tea bright. A deeper roast adds warm notes of caramel, nuts or toast.
Its own category, not "half green, half black"
It is tempting to think of oolong as a mix of green and black tea. It isn't. In Chinese tea tradition, tea is grouped into six main families: green, yellow, white, oolong, black and dark tea. Oolong has its own name, its own methods and its own long history.
The name itself has a story. "Oolong" (烏龍) means "black dragon." The most common telling says the dark, twisted leaves looked like little dragons curled up in the tin. Whichever story you believe, the name stuck, and today oolong is one of the most loved teas in the world.
One category, many flavours: Mio Tea's oolongs
Because oxidation and roasting can be dialled up or down, oolong covers a wide range of flavours. Taiwan is famous for it, from light, fragrant mountain teas to rich, honeyed ones. Here is how our oolongs compare:
|
Tea |
Style |
Tastes like |
|---|---|---|
|
Light oxidation, from the Jin Xuan cultivar |
Creamy, buttery, orchid; known as "Milk Oolong" with no milk added |
|
|
Jade Oolong (in the Twin Oolong Collection) |
Light and fresh |
Gardenia, orchid, a hint of tropical fruit |
|
Scented with real pomelo blossoms |
Citrus blossom, light honey |
|
|
Deeper oxidation, made from leafhopper-bitten leaves |
Honey, ripe fruit, naturally sweet |
|
|
Oak-aged, alcohol-free |
Warm, woody, rounded |
New to oolong? Start with Kinsen for something smooth and creamy, or Lychee Kiss if you like a sweeter cup. Want to go deeper? Read our complete guide to Kinsen Oolong.
Note for Liyu: when the new packaging launches, update Lychee Kiss → Sunkissed Nectar Oolong and Whisky → Oak-Aged Oolong here.
Caffeine and what's in your cup
Like all true tea, oolong contains caffeine. It usually lands between green and black tea, but the amount in your cup depends more on how much leaf you use and how long you steep it than on the tea type.
Oolong also naturally contains tea polyphenols and L-theanine, an amino acid found in tea. Many people find this gives a calmer, steadier kind of alertness than coffee. With no sugar or milk needed, it is an easy everyday drink.
How to brew oolong
Hot brew
- Tea: about 3 g of leaves (or 1 tea bag) for 150–200 ml of water
- Water: 85–95°C; use the lower end for light, floral oolongs
- Time: 2–3 minutes
- Re-steep: good oolong can be steeped 3–5 times; add about 30 seconds each time
Cold brew
Use 1 g of tea for every 100 ml of room-temperature water, then refrigerate for 6–8 hours. Cold brewing brings out oolong's sweetness with almost no bitterness. See our simple cold brew guide for more.
FAQ
Is oolong healthier than green tea? Neither is simply "healthier." Both come from the same plant and contain tea polyphenols. Choose the one you enjoy drinking.
Why does some oolong look like tight little balls? Many Taiwanese oolongs are rolled into balls. As they steep, the leaves slowly open up, which is part of the fun of watching them brew.
Does oolong contain milk or fruit? Not unless it says so. Kinsen tastes creamy and Lychee Kiss tastes fruity, but those flavours come from the leaf and how it is made, not from added ingredients.
Can I drink oolong every day? Yes, many people do. Just keep the caffeine in mind if you drink it late in the day.
A cup of calm, in between
Oolong lives in the space between green and black tea, and that is exactly what makes it special: fresh but rich, light but layered, and different with every steep.
If you are just starting your oolong journey, we would love to be part of it.
Explore our Taiwanese oolongs and follow along on Instagram at @mio_teaca.
A cup of calm. A soft moment of joy.
MIO TEA