Iced matcha — cold whisk, shaken and cold brew, step by step

Iced matcha is not simply hot matcha over ice. The flavour profile shifts, and with it the ratios and the order of operations. The good news: the cold version is more forgiving — it is harder to ruin with bitterness.

Why cold tastes different

In hot water the catechins — the compounds behind astringency and bitterness — move into the drink quickly. In cold water they do so far more slowly, while the amino acids responsible for umami and sweetness cope with low temperatures much better.

The result is a drink that is gentler, smoother and noticeably sweeter without adding anything. That is why iced matcha is usually a good first encounter for someone who found the hot version too strong.

Three methods

Method	Time	Kit	Result
Cold whisk	1 minute	chasen or frother	closest to the classic taste, light foam
Shaken (in a jar)	30 seconds	screw-top jar	fastest, coarse short-lived foam, nothing to clean
Cold brew	overnight in the fridge	a bottle	gentlest and sweetest, made ahead

Method 1 — cold whisk

1. Sift 2 g of matcha into a bowl or glass. With cold drinks, sifting matters more than usual.
2. Add 30–40 ml of lukewarm water (around 40 °C) and whisk smooth. This is the crucial step: the powder must disperse before it meets ice.
3. Add ice and top up with cold water to 200 ml.
4. Stir once and drink.

Why 40 °C: in water close to freezing, matcha particles resist wetting and clump into lumps that no chasen will break up afterwards.

Method 2 — shaken in a jar

Put 2 g of matcha into a screw-top jar, add 50 ml of lukewarm water and shake for 10 seconds. Only then add ice, top up with cold water and shake for another 10 seconds.

Ideal at work and while travelling, because it needs no chasen. Do not expect fine foam — a jar aerates differently from a whisk, so what you get is coarser and short-lived. More on what a chasen cannot be replaced by: chasen — how to choose →

Method 3 — cold brew

Put 2 g per 300 ml of cold water into a bottle, shake hard and refrigerate for 6–12 hours. Shake again in the morning and drink.

Important: matcha is a suspension, not an infusion. There is nothing to strain, and the powder will naturally settle overnight — which is why you shake before serving. Drink cold brew within 24 hours, after which it starts losing colour and freshness.

Can you mix matcha with cold water?

Yes, with one caveat: shaking works, stirring does not. In a closed bottle or jar the powder disperses even in cold water, because vigorous shaking breaks the lumps apart — that is exactly how the cold brew in method 3 is made. With a spoon or a chasen in ice-cold water it barely works: the particles wet poorly and float on top as lumps.

Without a bottle, take the detour through 30–40 ml of lukewarm water and only then top up with cold. Temperature does not change the caffeine: you drink the whole leaf, so a 2 g serving gives the same 60–70 mg cold as it does hot.

Matcha hot or cold?

A matter of taste, not of effect. Hot (70–80 °C) matcha is fuller, with more umami and more foam — the classic bowl. Cold it is gentler, sweeter and more forgiving. What is in the glass is the same, because nothing is strained off; what changes is what you taste, not what you drink. Which temperature suits what: water temperature for matcha →

Iced matcha latte — the order matters

1. Sift 2 g of matcha into a tall glass.
2. Add 40 ml of lukewarm water and whisk smooth — no lumps, no exceptions.
3. Fill the glass with ice.
4. Pour in 150–180 ml of cold milk.
5. Add the whisked matcha on top, slowly, over a spoon or down the side.

That last step is not only for looks — a green layer sinking into the milk means the matcha was not smashed against the ice and did not settle at the bottom. The classic hot recipe is here: matcha latte recipe →

Four mistakes that ruin cold matcha

• Powder straight into cold milk. The most common mistake of all. Fat and low temperature coat the particles before they can wet — nothing will remove those lumps afterwards.
• Sugar instead of syrup. Crystals do not dissolve in a cold drink and end up at the bottom. Use syrup, or dissolve the sugar in the lukewarm water from step two.
• Too much ice at the start. Ice dilutes the drink as it melts. Better to use less of it and genuinely cold milk.
• Rescuing culinary grade with sweetener. Cold softens bitterness but does not remove it. If the powder is bitter hot, cold it will merely be less bitter — how to recognise good matcha →

Plant milks

An iced latte is easier here than a hot one — nothing curdles. What remains is taste and separation:

• Oat (barista version). The safest choice: creamy, faintly sweet, does not separate over ice.
• Almond. Lighter and distinctly nutty — it can dominate a gentler matcha.
• Soy. Plenty of protein and a full body, but the most prone to separating with acidic additions such as lemon syrup.
• Coconut. A great flavour match, sometimes thin — look for a barista version.

For cafés: a batch base

Whisking every serving individually stands no chance against a queue. The standard answer is a concentrate: matcha dispersed in water in bulk and kept in a bottle in the fridge.

• Working ratio: 20 g of matcha per 500 ml of water — one serving is then 50 ml of concentrate.
• Disperse the powder in a small amount of lukewarm water first, then top up with cold.
• Keep it refrigerated in an opaque bottle and shake before every serving.
• Make it for a single shift. After a few hours the colour fades, and after a day the drink is simply different.

The cost per serving, margin and pack format for a venue are set out here: matcha on a café menu →, and the wholesale formats are in our B2B offer.

In short

Always disperse the powder in a little lukewarm water before adding ice or milk. The rest is only a choice of method: a chasen when you want foam, a jar when you are in a hurry, cold brew when you want it ready in the morning.

The gentler SABI line works well cold: see Avelor matcha →

For autumn and winter: spiced matcha latte with cinnamon and cardamom →

The purple iced version — a layered ube matcha latte — works on the same principle: lighter matcha on water slides over the ice onto heavier, sweetened milk.

Two cold drinks from the same base have their own recipes: matcha lemonade (no milk, with lemon and bubbles) and a three-layer strawberry matcha latte.