My matcha latte is lumpy and the powder sinks

In short

Matcha is a suspension, not a solution, and it has to be suspended before the milk arrives. Whisking powder directly into cold or hot milk skips the step that makes the drink work, and no amount of extra whisking afterwards recovers it.

Likely causes, in order

Most likely first. Answer the question under each one before moving on — several of these look alike in the cup and are told apart only by what was done to the leaf.

1. 1. The powder went straight into milk without being suspended in water first

   Technique

   Check: Did you whisk the matcha with a little water before adding the milk?

   Fix: Sift the powder, whisk it with 50–60 ml of water at about 75 °C until it is smooth, then add the milk. Milk’s fat and protein interfere with wetting the particles, so the water stage is not optional.

2. 2. The powder was not sifted

   Technique

   Check: Does the dry powder hold its shape when pressed with a spoon?

   Fix: Push it through a fine sieve first. Milled tea compacts into clumps under its own weight and static in storage, and a clump that reaches liquid intact will not break up.

3. 3. Settling because there is nothing holding the particles up

   Technique

   Check: Does it look right for the first minute and then separate?

   Fix: This is normal behaviour for a suspension and is not a fault. Stir before each mouthful, or use a shaken or blended preparation, which holds particles up longer than a whisked one.

4. 4. Cold milk poured onto a hot suspension too fast

   TechniqueInferred by TeaHQ, not established

   Check: Did you add all the milk at once?

   Fix: Add the milk gradually while stirring. A sudden temperature drop encourages the particles to flocculate into visible specks.

5. 5. A coarse-milled powder

   Leaf qualityInferred by TeaHQ, not established

   Check: Does the drink feel gritty on the tongue as well as looking uneven?

   Fix: Stone-milled matcha reaches a few microns; cheaper powders ground on other equipment do not, and coarse particles settle faster and feel gritty. This is a grade problem rather than a technique one.

Tea types this applies to

• Green tea

Brewing methods this applies to

• Whisking (bowl-prepared powdered tea) — Powdered leaf suspended in water rather than steeped and strained — the only common preparation in which the leaf itself is consumed rather than discarded.

Related problems

Sharing a cause category, a tea type or a brewing method with this one.

• My matcha is harsh and I think it is a cooking grade — A matcha bought to drink is dull-coloured, gritty and aggressively bitter, and the tin says culinary, cooking or ingredient grade — or says nothing at all.
• Leaves stick to the cup, the pot and my teeth — Fine leaf clings to the inside of the vessel, comes through into the cup, and ends up in the last mouthful.
• My bamboo whisk is losing tines — Fine bamboo tines snap off during whisking and turn up in the bowl, and the whisk feels stiff and splayed.
• My Japanese green tea tastes of seaweed or fish — A sencha, gyokuro or matcha reads as marine — seaweed at best, distinctly fishy at worst — and it is not clear whether that is the tea or a fault.
• My matcha is lumpy, gritty or will not foam — Undissolved lumps float on the surface, powder settles at the bottom, and no fine foam forms.

Sources