In short: An iced matcha latte is matcha whisked to a smooth paste, then poured over ice and topped with cold milk, creamy but not blended. Whisk 2 g (1 tsp) of matcha with a splash of water below boiling, pour it over a glass of ice, then add 180–240 ml of cold milk. Ready in about five minutes.
A note on the numbers: the amounts, temperatures and timings are standard barista conventions, reviewed by Erin Young: reliable starting ranges, not a lab-measured rule. The calorie and caffeine figures are drawn from the cited sources below.
What is an iced matcha latte?
Matcha with cold milk over ice: creamy and poured rather than blended. That separates it from a plain iced matcha (matcha and cold water, no milk), a hot matcha latte (steamed milk), and a matcha frappe (blended into a slush).
What you need for an iced matcha latte
One glass, about five minutes. Everything here is a home convention, so treat the amounts as a starting range and adjust to taste.
| Ingredient | Amount |
|---|---|
| Matcha | 2 g (1 tsp), up to 4 g (2 tsp) for a stronger, greener drink |
| Water, for the paste | 30–60 ml, below boiling at ~70–80 °C |
| Cold milk, dairy or plant | 180–240 ml |
| Ice | about 1 cup, poured over not blended |
| Sweetener (optional) | 1–2 tsp maple, honey or simple syrup, to taste |
These are reviewer-confirmed conventions for one tall glass, not a fixed formula; the recipe makes 1 and scales up cleanly.
Iced matcha latte, step by step
- Make a paste. Sift 2 g (1 tsp) of matcha into a cup, add 30–60 ml of water below boiling (~70–80 °C), and whisk in a zigzag until smooth and lump-free. Boiling water scorches matcha and turns it bitter, so let a just-boiled kettle rest for a minute; for a fully cold drink, cold-whisk the paste instead.
- Sweeten now, if you want it. Stir 1–2 tsp of maple, honey or simple syrup into the warm paste, where it dissolves easily; granulated sugar and honey won't dissolve once the drink is cold. Unsweetened is the default.
- Fill a glass with ice. Fill a tall glass with about 1 cup of ice; the drink is poured over the ice, not blended, since blending would make a frappe.
- Top with cold milk. Pour the paste over the ice, add 180–240 ml of cold milk, and stir once. Start to finish is about 3–5 minutes for one tall glass.
The step people rush is the paste. A fine-pronged bamboo whisk breaks matcha down more smoothly than a spoon, which keeps the finished drink from tasting gritty. If you want the right tool, the Zen matcha tea set pairs a whisk and scoop with the matcha, so you can measure the dose by the teaspoon and whisk out every lump.
What's the matcha-to-water-to-milk ratio?
The ratio for one iced matcha latte is 2 g (1 tsp) of matcha, 30–60 ml of water for the paste, 180–240 ml of cold milk, and about 1 cup of ice, sweetened to taste. Those are reviewer-confirmed home conventions, not measured ideals, so nudge them up or down to taste.
Most recipes skip the reason behind the amounts. An iced latte uses more milk than a frappe because the ice is poured over, not blended, so it dilutes the drink far less. Cold and ice also mute matcha slightly, so many people go a touch stronger than for a hot latte, up to 2 tsp for a vividly green glass.
How do you stop matcha going lumpy or bitter in a cold drink?
Whisk it into a smooth paste with a small splash of water before it ever meets cold milk. A lumpy, bitter iced latte is almost always un-whisked powder tipped straight into cold milk, where it will not dissolve.
Two habits fix it. Sift 2 g (1 tsp) of matcha first to break up clumps, then whisk it with 30–60 ml of water into a glossy, even paste. And keep the water below boiling, around 70–80 °C, because boiling water scorches matcha and is the usual cause of bitterness. For a fully cold drink, cold-whisk the paste instead.
What's the best milk for an iced matcha latte?
The best milk depends on what you want most: froth, richness or the fewest calories. Oat is the crowd favourite: naturally sweet, creamy, and it froths well cold, closest to a cafe drink. Whole dairy is the richest, almond the lightest and nuttiest, soy neutral and good at frothing.
| Milk (unsweetened, ~240 ml) | Froth and taste | Milk calories |
|---|---|---|
| Oat | Creamy, naturally sweet, froths well cold; closest to a cafe drink | ~118 kcal |
| Whole dairy | Rich and classic | ~149 kcal |
| Soy | Neutral, froths well | ~93 kcal |
| Skim / nonfat dairy | Lighter dairy option | ~83 kcal |
| Almond | Lightest and nuttiest, thinner body | ~47 kcal |
Per-cup milk calories from USDA FoodData Central for an unsweetened cup of milk. Add matcha's small calorie contribution separately. The froth and taste ranking is a reviewer-confirmed taste call, not a health claim.
That means an unsweetened iced latte runs from about 47 kcal with almond milk to 149 kcal with whole, the matcha adding only 6–7 kcal, and each teaspoon of syrup roughly 15–30 kcal. Choose almond or skim to keep it light, whole or oat for a richer glass.
Can I make it dairy-free or vegan?
Yes: an iced matcha latte is easy to make dairy-free, and matcha itself is naturally vegan. Swap in any plant milk at the same 180–240 ml volume, with no other change to the method. Oat is the creamiest and closest to a cafe latte, almond is the lightest, and soy and coconut both work too.
Per cup, oat milk is about 118 kcal and almond about 47, while the matcha adds only 6–7 kcal. Coconut milk brings a tropical note; it varies too much by brand to pin a single figure, so check the carton.
How do I sweeten an iced matcha latte?
Sweeten with 1–2 tsp of maple, honey or simple syrup, dissolved into the warm matcha paste or the milk before the drink hits the ice. Add it early: granulated sugar and honey won't dissolve in a cold drink, so they sink to the bottom if you add them at the end.
Unsweetened is the default, and the main advantage of making it at home: you control the sugar, unlike a cafe drink. A liquid sweetener blends most cleanly, and each teaspoon adds roughly 15–30 kcal.
What grade of matcha should I use for an iced latte?
Grade is about colour, flavour and cost, not health. It matters here because cold milk and ice mute and dilute the matcha, so a dull, brownish culinary-grade powder reads muddy and flat. Matcha runs on a rough scale from culinary, which is robust and can taste dull or bitter, up to ceremonial, which is delicate and made to be whisked with water alone and sipped.
For an iced, milk-based, lightly sweet drink, ceremonial grade is overkill: you pay for nuance that is mostly lost under cold milk and ice. A vivid-green premium grade is the sweet spot between the two: robust enough to hold its colour and flavour through cold milk and ice without reading muddy-brown, and without the ceremonial price premium.
That is exactly where our Premium Grade Matcha Tea Powder is pitched: a single vivid-green matcha that stays green and grassy under cold milk and ice instead of fading to brown. It is the one we reach for when we make an iced latte.
Iced matcha latte vs a hot latte, plain iced matcha, and a frappe?
The iced latte is the milky, poured-over-ice, unblended version, easy to confuse with three nearby drinks. A hot matcha latte is the same drink with steamed hot milk instead of cold milk and ice. A plain iced matcha is matcha with cold water over ice, no milk, lighter and more tea-like; for a fruit twist there is our iced strawberry matcha latte. And a matcha frappe is matcha, milk and ice blended into a slush.
To get close to the Starbucks iced matcha latte, know that theirs is made with a sweetened matcha blend, so it is sweeter and milkier than pure matcha. Match it with a sweeter oat or dairy milk and 1–2 tsp of syrup; our Starbucks iced matcha latte copycat has the exact build. For a cafe finish, top the glass with a matcha cold foam.
How much caffeine and how many calories are in an iced matcha latte?
An iced matcha latte has roughly 60–130 mg of caffeine, set by how much matcha you use; the milk and ice do not change it. That range is computed from a 1–2 tsp (2–4 g) dose rather than measured in a finished glass, so treat it as an estimate, not a lab figure. For the full breakdown, see our guide to caffeine in matcha.
For safety context, EFSA puts about 400 mg of caffeine a day as safe for most healthy adults, and up to about 200 mg a day in pregnancy, so one iced latte sits comfortably within that for most people.
Calories come almost entirely from the milk: about 149 kcal for whole, 118 for oat, 93 for soy, 83 for skim and 47 for almond per cup, plus around 6–7 from the matcha itself. Each teaspoon of sweetener adds roughly 15–30 kcal; unsweetened with almond milk is the lightest build. There is more in our matcha calories guide.
Iced matcha latte — FAQ
What is an iced matcha latte? Matcha with cold milk over ice, not blended (that's a frappe) and not water-only (that's a plain iced matcha). You whisk the matcha into a paste first, then pour it over ice and top with cold milk.
What's the matcha-to-milk ratio for an iced matcha latte? For one glass, use a reviewer-confirmed starting range: about 2 g (1 tsp) of matcha, 180–240 ml of cold milk and roughly 1 cup of ice, sweetened to taste; it is not a measured rule. Use up to 2 tsp for a stronger, greener drink.
How do you stop matcha being lumpy or bitter in a cold drink? Whisk it to a smooth paste in a little water below boiling (~70–80 °C) first, then chill it. A lumpy, bitter cold drink is almost always un-whisked powder tipped straight into cold milk. Sift the powder first too.
What's the best milk for an iced matcha latte? Oat is the all-round favourite: creamy, naturally sweet and it froths well cold. Whole dairy is richest, almond is lightest, soy is neutral. It is a taste and texture call, not a health one.
Can I make it dairy-free or vegan? Yes. Use any plant milk, oat, almond, soy or coconut, at the same volume; matcha is naturally vegan. Oat is closest to a cafe latte; almond is lightest at about 47 kcal a cup.
How do I make it taste like the Starbucks iced matcha latte? Starbucks uses a sweetened matcha blend, so it is sweeter and milkier than pure matcha. Match it with a sweeter oat or dairy milk and 1–2 tsp of syrup; our Starbucks iced matcha latte copycat has the exact build.
Is an iced matcha latte healthy? It depends what you put in it. Unsweetened, it has no added sugar and you control the sweetener. Calories come from the milk, about 47 kcal (almond) to 149 (whole) per cup. In pregnancy, keep total caffeine under about 200 mg a day.
How much caffeine is in an iced matcha latte? Roughly 60–130 mg, estimated from a 1–2 tsp (2–4 g) matcha dose rather than measured in the glass. EFSA considers up to about 400 mg a day safe for most healthy adults, and 200 mg in pregnancy. See our caffeine in matcha guide.
About the author and sources
Written and reviewed for accuracy by Erin Young, founder of Zen Green Tea, sourcing matcha directly from Japanese farms. Her review here is experiential rather than clinical; a credentialed medical reviewer is an open upgrade for the health figures.
How we chose the recipe amounts: no authority publishes a lab-measured standard for a home iced matcha latte, so the doses, ratios, temperatures and times above are a working home-kitchen convention Erin has confirmed against Zen's own matcha, given as ranges to adjust to taste. The per-milk calorie and caffeine figures come from the cited sources below.
Sources
- USDA FoodData Central — per-cup calories for whole, oat, soy, skim and almond milk, and for matcha powder
- EFSA (European Food Safety Authority) — daily caffeine guidance for healthy adults and in pregnancy
- PMC / NIH (peer-reviewed matcha analysis) — matcha caffeine per gram, used to estimate the iced-latte range