The Hong Kong Milk Tea Handbook · hkstylemilktea.com/iced-milk-tea/
How to make iced milk tea that doesn't go watery
Ice melts, and melted ice is water. The better cha chaan tengs keep it out of the drink altogether: the glass stands in a bowl of ice, or the tea is chilled in a bottle. At home the rules are the same. Brew it strong, sweeten it while it's hot, chill it fast, and keep the ice on the outside.
The recipe
Ingredients
- Black tea blend, the same as for hot milk tea36 g
- Water, freshly boiled700 ml
- Sugar, stirred in while hot4–6 tsp
- Evaporated milk, unsweetened, chilled120 ml
- Ice, for the outside of the glass2 bowls
Ice bath: stand each glass in a bowl of ice and a little water, the cha chaan teng's 冰鎮 way. Milk tea ice cubes: freeze a glassful of this recipe in an ice tray the day before. As they melt, they turn into more milk tea.
Everything from the hot recipe: a cotton tea sock or a lined sieve, and two heatproof pots to pour between. Add a heatproof jug or bottle for chilling, and a large bowl of ice water.
About an hour, mostly waiting
- Brew it stronger than hot. Make the tea as in the hot recipe: a hard 3-minute boil, four pulls, 12 minutes covered, two more pulls. Use about a quarter more tea. Cold drinks taste weaker than hot ones, and any ice that melts thins it further.
- Sweeten it while it's hot. Stir in 2 to 3 teaspoons of sugar per glass now. Sugar dissolves easily in hot tea and badly in cold. In a cha chaan teng, iced drinks arrive already sweetened; order 少甜 for less.
- Chill it fast. Pour the tea into a heatproof jug or bottle and stand it in a bowl of ice water. Stir now and then; it will be cool in about 15 to 20 minutes. Then cover it and finish chilling it in the fridge. Hong Kong's Centre for Food Safety recommends an ice-water bath for cooling cooked food quickly.
- Milk in the glass first. Put 60 ml of cold evaporated milk in each glass and pour the cold tea onto it. You want the same solid tan as the hot version.
- Keep the ice outside. Stand each glass in a bowl of ice, or use milk tea ice cubes. Plain ice works too, as long as you drink it quickly.
- Don't leave it out. Drink it within a couple of hours, or keep it covered in the fridge. The Centre for Food Safety says cold drinks shouldn't stand at room temperature for more than two hours.
For an iced 茶走, leave out both the sugar and the evaporated milk, and stir 2 to 3 tablespoons of condensed milk into the hot tea instead.
Printed from hkstylemilktea.com/iced-milk-tea/ — the full page explains why iced milk tea goes watery and how cha chaan tengs serve it.
The problem
Why iced milk tea goes watery
An ordinary cha chaan teng 凍奶茶 is hot milk tea, milk already in, poured over ice. Cooling a hot drink that way melts roughly its own weight of ice, so by the time it's cold, close to half of what's in the glass can be water. Every fix below attacks that.
Brew it stronger
Recipes for iced milk tea advise brewing 20 to 30% stronger, so whatever dilution happens still leaves a proper cup.
Chill it first
Tea that's already cold barely melts the ice it meets. Chill it in an ice bath, then the fridge, before it goes anywhere near a glass of ice.
Ice outside the glass
The 冰鎮 method: the glass sits in a bowl of ice, which chills it without touching the drink.
Ice made of milk tea
Freeze some milk tea in an ice tray. The cubes chill the drink, and as they melt they add more milk tea, not water.
On the menu
How the cha chaan teng does it
Five ways to order it cold, and what each one means. Romanisation is Jyutping; the numbers are tones.
Iced drinks almost always cost a little more than hot ones. HK$2 extra has long been the norm, sometimes HK$3, and a café charging HK$4 made the news in 2026.
Sources
- South China Morning Post, HK Magazine — Hong Kong's iconic milk tea (ice-bath and bottled milk tea)
- Localiiz — A guide to Hong Kong's milk tea (bottled milk tea)
- EdUHK — 香港傳統文化:飲食文化 (teaching material: iced milk tea, 原裝凍)
- Sing Tao Headline (2026) — sugar in iced milk tea and 少甜
- am730 (2026) — the surcharge on iced drinks
- Dimsum Daily (2026) — a HK$4 iced-drink charge in Yuen Long
- Weekend HK — one café's charges for iced drinks and 走冰
- Centre for Food Safety — Summer times and food safety (cold drinks and the two-hour rule)
- Centre for Food Safety — Cooling cooked food (the ice-water bath)
- Sift & Simmer — Hong Kong milk tea, hot or iced (brewing 20 to 30% stronger)
- The Takeout — Cracking the code to Hong Kong milk tea (milk tea ice cubes)
The physics is approximate: cooling a hot cup to fridge temperature with ice alone takes a little under its own weight of ice, depending on how cold the ice was to begin with.