The 30/20/10 Rule for Matcha: What It Means and How to Use It
The 30/20/10 rule appears in online matcha discussions with slightly different meanings depending on the source. It is not a standardised rule from any single authority, but there are useful interpretations worth understanding.
The whisking interpretation
Most commonly, '30/20/10' refers to a whisking framework:
- 30 seconds total whisking time to develop foam
- 20 seconds of fast, vigorous zigzag motion to incorporate air
- 10 slower finishing passes to settle and refine the foam
This is a practical guide, not a precise rule. The principle — start fast, finish slowly — holds regardless of exact timing.
Standard preparation ratios to use
- Usucha (thin tea) — 1.5–2g matcha in 70–80ml water at 70–80°C
- Koicha (thick tea) — 3–4g matcha in 30–40ml water, paste-like consistency
- Matcha latte — 1.5–2g in 40–50ml hot water, topped with 150–200ml milk
What actually matters in preparation
Temperature, powder quality, whisking technique, and sifting have more impact on your cup than any memorised ratio. Use good matcha, avoid boiling water, sift the powder, and whisk properly in a zigzag motion. The specific numbers are a useful starting point, not a rulebook.
