"Too often, I've ordered a matcha latte from a chain or independent café, often charging a premium price, and found lumps of undissolved matcha settled at the bottom of the cup. They're not always visible at first; the drink looks fine on top, and it's only a few sips in, or right at the bottom, that the lumps show up. For a premium drink, it's a small detail that undermines the whole experience."
— Lucas, Trainer at Moicha
It's also one of the easiest problems to fix.
The real cause
Most cafés assume lumps come down to the powder, poor quality or the wrong grade. In our experience, that's rarely the actual cause. We've lost count of how many cafés stock matcha simply because it's trending, with no training behind it, no one explaining technique, staff left to guess. The lumps aren't a matcha problem. They're a training gap, and most of the time it comes down to one simple, fixable habit: whisking in a bowl instead of a cup.
A bamboo whisk works by moving rapidly through the powder and water in a brisk zigzag, breaking up clumps and creating an even, frothy suspension. That motion needs room to work, a cup is too narrow and deep, so the powder gets pushed around rather than broken down.
The simple fix
- Sift the matcha first. A quick sift removes larger clumps before the whisk even gets involved.
- Use a bowl, not a cup. A wide, shallow bowl gives the whisk the space it needs. Our bamboo matcha whisk and complete matcha set are designed to get this right from the start.
- Use the right water temperature. Around 70–80°C, not boiling.
- Whisk briskly in a zigzag, not a circular motion — a "W" or "M" shape breaks up powder far more effectively.
- Whisk for long enough. Stopping too early is another common cause of clumping. Keep going until a light froth forms on the surface, that's the signal it's ready.
Why this matters
Because the lumps settle at the bottom, customers often discover them partway through the drink, which can read as inconsistency rather than an isolated mistake. The good news: this is entirely a training issue, not a sourcing one. Even premium matcha turns out lumpy if whisked the wrong way.
But training has to survive staff turnover, and that's where most cafés quietly lose it.
"I trained a café's team myself, sifting, bowl, temperature, the zigzag motion, all of it. A few weeks later I went back, and the original staff had already left. None of what I'd taught had been passed on to the new team. The lumps were back. Not because the matcha had changed, but because the knowledge had walked out the door with the people who'd received it." — Kevin, Trainer at Moicha
Get the technique right and consistency becomes simple to maintain. But it only stays simple if it's built into how the café onboards new staff, not just delivered once and hoped for.
Moicha supplies ceremonial and latte grade matcha to independent cafés across the UK, sourced directly from Uji, Kyoto and Shizuoka. We offer staff training to select café partners to make sure technique never lets great matcha down.