An iced matcha latte should be vivid green, smooth, subtly sweet, and taste genuinely of matcha — not like a green milkshake. The difference between a great one and a mediocre one comes down to one technique: always dissolve the matcha in hot water first before adding cold milk. Skip this step and you get clumps, bitterness, and a grey-green colour. Follow it and every iced matcha you make will look and taste like a $9 café version.
The rule that fixes everything: Cold liquid does not dissolve matcha. Always whisk matcha with a small amount of hot water (75–80°C) first to make a smooth paste, then add cold milk over ice. This is the only technique that works.
What you need
- Matcha powder: 1.5–2g (about 1–1.5 tsp) of a good latte or ceremonial grade. See our latte powder guide — Jade Leaf latte blend is our pick.
- Hot water: 30ml at 75–80°C. Not boiling — boiling water scorches matcha and makes it bitter.
- Milk: 200–250ml of your preferred milk. Barista oat milk produces the best colour and texture.
- Ice: A full glass of ice cubes.
- Optional sweetener: 1 tsp simple syrup, honey, or maple syrup.
- Frother or chasen: To dissolve the matcha completely in the hot water.
To get the right powder and tools: Jade Leaf Latte Blend on Amazon · Handheld frother
The method — step by step
Sift the matcha. Add 1.5–2g matcha to a small cup or bowl. Sift if possible — this prevents bitter clumps in the final drink.
Add hot water and whisk. Pour 30ml of 75–80°C water over the matcha. Whisk with a frother or chasen in quick W or M motions until you have a completely smooth, slightly foamy paste with no dry powder visible at the sides.
Add sweetener now if using. Stir 1 tsp of simple syrup or honey into the hot matcha paste — it dissolves much better in the warm paste than in cold milk.
Fill a glass with ice. Use a tall glass and fill it completely with ice cubes.
Pour matcha paste over ice. Pour the green paste over the ice and watch it pool at the bottom — this is correct.
Pour cold milk over the top. Add 200–250ml cold milk slowly. It will create a beautiful layered effect — green at the bottom, white on top. Stir gently before drinking or leave layered for photos.
Variations
Oat milk iced matcha latte
The best milk for iced matcha. Use a barista oat milk (Oatly Barista, Minor Figures, or similar) — these have added fat that makes the latte creamier and the colour more vibrant. The neutral sweetness of oat milk complements matcha better than any other plant milk.
Coconut milk iced matcha latte
Use canned coconut milk diluted 50/50 with water, or a carton coconut milk. This produces a richer, more tropical version. The coconut flavour is strong enough to compete with — but not overwhelm — a good latte-grade matcha. Add a pinch of salt to amplify both flavours.
Sweetened matcha latte (café style)
Most cafés add a vanilla syrup or simple syrup. Make a basic simple syrup by dissolving equal parts sugar and water, then add 1–2 tsp to the matcha paste in step 3. For vanilla, add half a teaspoon of vanilla extract to the syrup.
Iced matcha with cold foam
Froth 60ml of cold heavy cream or full-fat oat milk until thick but pourable. Pour your iced matcha latte without stirring, then spoon the cold foam over the top. This is the current café trend — the foam slowly mixes as you drink it.
What to buy for the best results
Specifically designed for lattes — stronger colour and flavour than ceremonial grade, stays vivid green in cold milk. Makes 20–25 iced matcha lattes per tin.
View on Amazon →The fastest way to make a lump-free matcha paste. Takes 15 seconds. Runs on two AAA batteries. The single most useful tool for daily matcha lattes.
View on Amazon →Find cafés serving great iced matcha
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Frequently asked questions
How do you make an iced matcha latte without it being clumpy?
The key is to never add cold liquid directly to dry matcha powder. Always whisk or froth the matcha with a small amount of hot water (75°C) first until you have a completely smooth, lump-free paste — then pour that paste over ice and add cold milk. This one technique eliminates clumping entirely.
How much matcha powder do you use for an iced matcha latte?
Use 1.5–2g (about 1–1.5 teaspoons) of matcha powder per serving. Mix with 30ml of hot water to form a paste, then pour over a full glass of ice and add 200–250ml of cold milk. Increase to 2g if you prefer a stronger flavour or are using oat milk, which can slightly mask the matcha taste.
What milk is best for an iced matcha latte?
Barista oat milk is the top choice — it stays vivid green, has a neutral sweetness that complements matcha, and creates a creamy result without dairy. Whole milk is the classic option. Almond milk works but can clash with matcha's grassy notes. Coconut milk has a strong flavour that competes with matcha and is generally not recommended.
Should iced matcha be sweetened?
Traditional matcha is unsweetened — the natural sweetness of good ceremonial grade matcha is sufficient. Most café versions add simple syrup, vanilla syrup, or honey. If you're new to matcha, start with a teaspoon of honey or maple syrup dissolved into the hot matcha paste before adding ice and milk, then gradually reduce sweetener as you adjust to the flavour.
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