Pu-erh TeaGuide
Cha Gao: Pu-erh Tea Resin (Tea Paste) Explained
Cha gao (茶膏, "tea paste") is pu-erh tea resin: a dark, glassy concentrate made by boiling tea down for many hours until only a thick paste remains, which is then dried into small pieces. Drop a piece the size of a grain of rice or a small pea into a cup of hot water and it dissolves into a cup of pu-erh in seconds. Most cha gao is made from shou pu-erh. It's the original "instant tea": stories trace it back to the Tang dynasty, and in the Qing dynasty it was made as a tribute for the imperial court.
How cha gao is made#
Pu-erh leaves are steeped in hot water again and again. The liquid is collected and slowly boiled down over many hours until it thickens into a dark paste. The paste is poured into moulds or spread thin, then dried into pieces, bars or granules. It takes up to about 100 kg of leaf to make 1 kg of resin, which is why good cha gao is concentrated and not cheap.
About 90% of cha gao is made from shou pu-erh. Resin from sheng is rarer and tastes brighter and more bitter.
A little history#
Concentrated tea paste is old: stories trace it back to the Tang dynasty, and in the Qing dynasty it was made as a tribute luxury for the court. Modern cha gao is a revival, and today it's made both by small producers and by factories.
What it tastes like#
| Pieces | Glossy black, hard, brittle |
| Liquor | Dark red to near-black, very clear |
| Aroma | Earth, wood, dates |
| Taste | Smooth, sweet, earthy, like a clean shou |
| Texture | Round, light to medium |
| Finish | Short, sweet |
It tastes like a simple, clean shou pu-erh, without the changing layers of a leaf session.
How to drink cha gao#
| How | Amount | Water | Time |
|---|---|---|---|
| Cup or mug | A piece the size of a grain of rice to a small pea | Hot, 95–100 °C, about 200–300 ml | Stir, 10–30 s |
| Thermos | 2–3 small pieces | Hot, about 500 ml | Shake, then drink |
| Cold | Dissolve in a little hot water, then add cold | Cold | Instant |
Start with less than you think: cha gao is very strong. If the cup is too dark, add water. Refill the same cup two or three times until the colour fades.
Cha gao vs brewed shou#
| Cha gao | Brewed shou | |
|---|---|---|
| Prep | Seconds, no teaware | Teapot or gaiwan, several minutes |
| Taste | Simple, smooth, consistent | Layered, changes with each steep |
| Best for | Travel, office, quick cups | Tea sessions |
More in sheng vs shou.
How to buy good cha gao#
- A trusted source and a clear statement of the raw material (shou or sheng).
- Clean, dark, glossy pieces, no strange smell.
- Dissolves completely, leaving a clear liquor.
- Beware: a harsh, burnt or sour taste, or a cloudy cup, usually points to poor raw material or processing.
Storage#
Foil or an airtight container, 15–25 °C, dry and away from sunlight. Stored well, cha gao keeps for many years (up to about 20). A white bloom on the surface is usually crystallized tannins and is harmless; fuzzy, coloured spots or a musty smell mean mould, so throw it away. More in how to store pu-erh.
Myths#
"Cha gao is instant tea powder with additives." Good cha gao is only concentrated tea; check the ingredients list.
"The white bloom is mould." Usually it's tannin crystals.
"Cha gao is stronger than coffee." It's as strong as you make it; use a small piece.
Practical advice#
Cha gao won't replace a proper pu-erh session, but it's an excellent travel tea. Keep a small tin in your bag.
The bottom line#
Cha gao is pu-erh resin, mostly from shou, made by boiling tea down for hours. A tiny piece dissolves into a smooth, earthy cup in seconds and keeps for years if stored dry. More in my pu-erh guide.
Questions people ask
What is cha gao?
Pu-erh tea resin: tea boiled down into a paste and dried.
How do you use cha gao?
Dissolve a piece the size of a grain of rice or small pea in a cup of hot water.
Does cha gao go bad?
It keeps for years if dry; mould means throw it away.
Is cha gao sheng or shou?
Most is made from shou; some from sheng.
What is the white powder on cha gao?
Usually crystallized tannins, which are harmless.
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