What is matcha?
Matcha is finely ground Japanese green tea — but that's the surface answer. The longer one: matcha is a powdered, shade-grown green tea you drink whole, which is why it has more caffeine than steeped green tea, more L-theanine than coffee, and a flavor closer to broth than anything else in the tea world.
The plant
Matcha comes from Camellia sinensis, the same plant that produces every other tea you've had. What sets matcha apart is what happens before harvest. For two to four weeks the bushes are shaded with bamboo screens or canvas, cutting sunlight by 70 to 90 percent. The plant compensates: chlorophyll climbs (hence the neon green), and the leaves push more amino acids into reserve, especially L-theanine, the compound most associated with matcha's distinctive calmer energy.
After harvest the leaves are steamed within hours to halt oxidation, then dried and de-stemmed. At this stage they're called tencha. Tencha is slow-ground between granite stones into the fine powder you buy. A single traditional stone mill (an ishi-usu) produces only 30 to 40 grams of matcha per hour and runs all day to make less than a kilogram. That's most of why quality matcha isn't cheap.
Matcha was first cultivated in Uji, just south of Kyoto, where the Zen monk Eisai planted seeds brought from China in the late 12th century. Today the heaviest production happens in Nishio (Aichi prefecture) — roughly a fifth of all Japanese matcha — and Kagoshima, which has become the country's biggest grower of tencha thanks to volcanic soil and a warmer climate.
What's inside matcha
Per gram of matcha — typical values, real numbers vary by harvest and grade.
| Compound | Per gram | What it does |
|---|---|---|
| Caffeine | 19–44 mg/g | Wide range across published analyses; ceremonial grade leans high. |
| L-theanine | 10–25 mg/g | Shaded leaves carry more — drives matcha's calm energy character. |
| EGCG (catechins) | ~50–60 mg/g | The catechin most studied for antioxidant effects. |
| Chlorophyll | Very high | Concentrated by shading — responsible for the neon-green color. |
| Fiber | ~30–40 g/100 g | Insoluble fiber from the whole ground leaf, mostly indigestible. |
Grades — and which to buy
Three tiers, three different uses. Pick the right one for what you're actually making.
$30–80 / 30 g tin
Ceremonial
Whisked usucha, koicha, sipping straight
Smooth, sweet, deep umami. Bright neon green.
Tip — Don't waste it in lattes — the milk masks what you paid for.
$15–30 / 30 g tin
Premium / Daily
Daily lattes, iced matcha, casual whisking
Slightly less sweet, more vegetal. Still bright green.
Tip — The everyday workhorse — best balance of cost and quality.
$8–15 / 30 g
Culinary
Baking, smoothies, ice cream, sauces
Sharper, more bitter. Olive-green tint.
Tip — Designed to survive heat and sugar. Don't drink it plain.
FAQ
What is matcha?
Matcha is finely ground green tea powder made from shade-grown Japanese leaves (specifically tencha). Unlike steeped tea, you whisk matcha into water and drink the whole leaf — which is why it has more caffeine, more antioxidants, and a richer flavor than regular green tea.
What is matcha made of?
Just one ingredient: dried, de-stemmed green tea leaves ground into a fine powder. That's it. No flavoring, no sweetener, no additives in pure matcha. Anything labeled 'matcha latte mix' or 'matcha-flavored' is something else.
Is matcha healthy?
Matcha is rich in EGCG (a catechin), L-theanine, and antioxidants. Studies link it to improved focus, lower oxidative stress, and modest cardiovascular benefits. It's not a miracle — but it's one of the more nutritionally dense things you can drink.
Where does matcha come from?
Japan, primarily from three regions: Uji (just south of Kyoto), Nishio in Aichi prefecture, and Kagoshima. Uji is the historic birthplace and still the prestige origin. Nishio produces the largest volume — somewhere around a fifth of Japan's domestic matcha. Kagoshima leads in tencha (the raw material) thanks to its warmer climate.
How is matcha made?
The bushes are shaded for two to four weeks before harvest, dropping sunlight by 70 to 90 percent. Leaves are then steamed, dried, and de-stemmed into tencha, the raw material. Tencha is slow-ground between granite stones into a fine powder. A traditional ishi-usu mill puts out only 30 to 40 grams per hour, which is most of why proper matcha isn't cheap.
What's the difference between ceremonial and culinary grade?
Ceremonial uses the youngest, most tender leaves and is smooth enough to drink plain. Culinary uses older leaves and is sharper — designed to survive milk, sugar, and heat. Premium / daily grade sits between them and is what most people should buy for everyday matcha.
Can matcha go bad?
Matcha doesn't spoil dangerously, but it loses color, flavor, and antioxidants fast once opened. Use within 6 weeks of opening; store sealed in the fridge. Brown or dull green powder is past its prime.