Koicha vs everyday whisked matcha
Thick tea is not strong tea. Koicha uses roughly three times the powder in half the water and is kneaded rather than whisked into foam, and it demands a grade of matcha that everyday preparation does not.
What is being compared
Why these get confused
Koicha is widely described as strong matcha or double-strength matcha. It is a separate preparation with its own ratio, its own whisk action and its own grade requirement, and the difference in the mouth is one of texture at least as much as intensity.
Point by point
| Aspect | Koicha (thick matcha) | Whisking (bowl-prepared powdered tea) |
|---|---|---|
| Ratio | Roughly 4 g of powder to 30 ml of water — a paste rather than a drink. | About 2 g to 60 to 70 ml. |
| Whisk action | A slow kneading and folding; foam is not wanted. | Brisk aeration to raise a fine even foam. |
| Texture | Pours like paint and coats the mouth. | Light, with a foam head. |
| Grade required | The finest available. A lesser powder is unbearable at this concentration. | A wide range works, including grades that would be harsh as koicha. |
| Water temperature | Lower, and it matters more because there is no dilution to hide behind. | Around 70 to 80 °C. |
| How it is drunk | In a few mouthfuls, and traditionally shared from one bowl. | Individually, a bowl each. |
The short answer
Anyone who has tried to make koicha with an everyday matcha has produced something undrinkable and reasonably concluded the preparation is not for them. It is a grade problem rather than a technique problem, and it is the one case in tea where the material genuinely cannot be substituted downward.
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