Hong Kong milk tea (sock-strained)
A blend of black teas brewed very strong and passed repeatedly through a long cloth filter between two pots, then finished with evaporated milk. The filter stains to a deep tan with use, which is where the popular name comes from — there is no stocking involved.
Also called silk stocking milk tea, pantyhose tea, cha chaan teng milk tea.
How it works
The blend is built from grades rather than from a single tea: fine broken leaf and dust for strength and colour, coarser leaf for body. It is boiled or steeped hard, and then the distinguishing step happens — the liquor is poured back and forth through the cloth bag, from one pot to the other, several times. Each pass does three things at once. It filters out the fines that would make the drink gritty, it aerates the liquor, and it works the liquid through a bed of tea held in the cloth, which is an extraction in its own right. The cloth also retains oils that a metal mesh lets through, and the result is a noticeably smoother, rounder mouthfeel than the same blend strained conventionally. Evaporated milk rather than fresh is standard, and its concentration and slight cooked note are part of the intended flavour rather than a substitution.
Why choose it
The pouring produces a texture that cannot be reached by brewing alone, and the drink is a defining one of Hong Kong’s tea-house culture. It is also a clean demonstration that the filter medium is a brewing variable rather than a neutral step.
Equipment
- Tea sock (cloth filter bag) — Cotton flannel, muslin or a similar close-woven cloth on a wire frame
- Brewing saucepan — Stainless steel or heavy-based aluminium; enamelled steel in many households
Tea types it suits
Recorded on the method rather than inferred from the catalogue. A type missing here is not ruled out; it simply has not been written down.
Common problems
- Using whole-leaf tea, which cannot give the concentration the drink is built on
- Pouring through the cloth once and stopping, which skips the step that makes the method
- Washing the cloth with detergent, which it holds and returns to the next batch
- Substituting fresh milk and expecting the same drink — the body of evaporated milk is part of the formulation
Diagnosed problems
Written from the symptom, with the likely causes in order and a question to rule each one out.
- My tea is drying and puckering rather than bitter — The tea makes the mouth feel dry and rough, gripping the tongue and cheeks, without necessarily tasting bitter.
Teas with parameters authored for this method
7 teas have a parameter set written for hong kong milk tea (sock-strained), in alphabetical order. Each row is transcribed from that tea’s own record.
| Tea | Leaf (g/100 ml) | Water (°C) | Authored infusions | First infusion (s) |
|---|---|---|---|---|
| Ceylon black tea | 3–5 | 95–100 | 1 | 480 |
| CTC black tea | 3–5 | 95–100 | 1 | 480 |
| Dimbula | 3.5–5.5 | 95–100 | 1 | 540 |
| Kandy tea | 3.5–5.5 | 95–100 | 1 | 480 |
| Ruhuna | 3.5–5.5 | 95–100 | 1 | 540 |
| Sabaragamuwa tea | 3.5–5.5 | 95–100 | 1 | 480 |
| Uda Pussellawa tea | 3.5–5.5 | 95–100 | 1 | 480 |
Other boiled and decocted methods
Same family, so the approach is close — the vessel, the ratio and the intent still differ.
- Boiling aged and dark tea (zhu cha) — Compressed or aged dark tea put into a kettle of water and brought to a simmer rather than steeped. It is a normal winter preparation for Liu Bao, aged shou pu-erh, brick tea and tea nuggets, and it is also what a gongfu session’s exhausted leaf is for.
- Boiling and decoction — Leaf, and usually other ingredients, simmered in water or milk rather than steeped — the basis of masala chai, butter tea and noon chai.
- Butter tea churning — Brick tea boiled at length, then churned with butter and salt into an emulsion. It is a daily staple across the Tibetan plateau and neighbouring highlands, and calling it a savoury drink undersells what it is: the churning changes its physical state, not just its seasoning.
- Chai preparation — Tea simmered with milk, sugar and whole spices rather than steeped — a decoction, and the daily preparation of a very large part of the world. There is no single authoritative recipe, and regional and household variation is enormous.
- Mongolian milk tea (suutei tsai) — Brick or green tea boiled in water and milk with salt, and aerated by being ladled and poured back into the pot repeatedly. It is an everyday drink in Mongolia and in Inner Mongolia rather than a ceremonial one, and it is savoury by design rather than as a variation on a sweet drink.
- Moroccan mint tea preparation — Chinese gunpowder green tea brewed strong with a large quantity of fresh spearmint and sugar, and poured from height into small glasses. It is the daily preparation and the hospitality ritual across the Maghreb, and the pour is functional as well as expressive.
- Noon chai (Kashmiri pink tea) — Green tea boiled long with a pinch of bicarbonate of soda, shocked with cold water, aerated, then finished with milk and salt. The pink colour is the visible consequence of the chemistry rather than an added ingredient, and the preparation belongs to Kashmiri households on both sides of the Line of Control.
Sources
This page is TeaHQ synthesis. No external source stands behind the description of this method. It is written from common practice as TeaHQ understands it, and the parameters in the table above come from each tea’s own record rather than from this page.
The numbers for this method are held per tea, never on the method itself. Where a tea has no set written for hong kong milk tea (sock-strained), TeaHQ shows nothing rather than converting its numbers from another style — a scaled ratio and a halved time read as an answer while being one nobody authored.
Written comparisons
Where TeaHQ has set this method against something it is routinely confused with, and argued the differences out in full.
- Hong Kong milk tea vs chai preparation — Two systems for making tea with milk that arrive at opposite textures. Hong Kong practice brews black tea very strong and passes it repeatedly through a cloth bag before evaporated milk goes in; chai simmers leaf, milk, sugar and spices together from the start.