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.
What is being compared
Why these get confused
Both are called milk tea in English, which suggests a family relationship that does not exist. One is an infusion strained into milk and the other is a decoction cooked in it, and no adjustment of ratios turns one into the other.
Point by point
| Aspect | Hong Kong milk tea (sock-strained) | Chai preparation |
|---|---|---|
| When milk enters | At the end, and it is evaporated milk rather than fresh. | During the simmer, so it cooks with the tea. |
| The tea | A blend of coarse and fine black grades, brewed very strong. | CTC, chosen because it survives simmering with milk. |
| The distinctive action | Repeated pouring through a cloth bag, which smooths the drink. | Simmering, and in many households a period of vigorous boiling. |
| Spices | None. | Whole spices, cracked rather than powdered, with enormous regional and family variation. |
| Texture | Notably smooth and thick from the straining and the evaporated milk. | Full, from the milk and the sugar cooked together. |
| Failure mode | A thin drink if the tea was not brewed hard enough. | Scorching, or a boil-over, or a harsh drink from over-boiling the leaf. |
The short answer
Both traditions concluded independently that tea for milk must be brewed much harder than tea for drinking plain, and both built a technique around the consequences of doing so. The straining and the simmering are managing the same problem from opposite ends.
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