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What is matcha?
Matcha is finely-ground Japanese green tea, shade-grown and whisked into water. What makes it different from green tea, how it's made, and how to brew it.
Matcha is a stone-ground powder made from shade-grown Japanese green tea leaves. Unlike steeped tea, you whisk the entire leaf into water and drink it — meaning every cup delivers the full nutritional profile of the plant.
How matcha is made
Three to four weeks before harvest, tea farmers cover the tea bushes with shade cloth. The lack of sunlight forces the plant to produce more chlorophyll and L-theanine, giving matcha its bright green color and characteristic umami sweetness.
After harvest, leaves are steamed to halt oxidation, dried, de-stemmed, and stone-ground into a powder so fine it floats on water.
Matcha grades
- Ceremonial grade — first-harvest leaves, brightest color, most delicate flavor. Whisk with water only.
- Premium grade — second harvest, slightly more astringent. Daily-drinking matcha.
- Culinary grade — later harvest, stronger flavor, holds up in lattes and baking.
How to brew matcha
- Sift 1–2 grams (about ½ tsp) of matcha into a warm bowl.
- Add 60ml of water heated to 70°C / 160°F.
- Whisk in a rapid W or M motion until a fine foam forms (~15 seconds).
- Drink immediately — matcha settles fast.
Matcha vs. regular green tea
Regular green tea is steeped and discarded. Matcha is consumed in full, so the caffeine, L-theanine, and antioxidant content per cup is roughly 3–4× higher. Published research has looked at how L-theanine and caffeine interact in combination — see "What the science measures" below for what that research actually recorded.
This describes published research and general information, not medical or dietary advice.
Frequently asked questions
Is matcha better than coffee?
Matcha (1 tsp / 2 g) has less caffeine than coffee — roughly 65–70 mg versus about 95 mg in an 8 oz brewed cup (see our <a href="/matcha-caffeine">matcha caffeine breakdown</a>). It also carries a meaningfully higher dose of L-theanine, an amino acid concentrated in tea, than most drinks. A 2008 study (Kelly et al., Journal of Nutrition, PMID 18641209) found that L-theanine combined with caffeine was associated with changes in EEG alpha-band brain activity and attention-task performance compared with either alone — a description of what that research measured, not a promise about how any individual cup will feel.
How much matcha can I drink per day?
There's no single number that's right for everyone, but here's what's published: the U.S. FDA has cited about 400 mg of caffeine per day as a general reference point for healthy adults that isn't generally associated with dangerous, negative effects. A standard 2 g (1 tsp) matcha serving has roughly 65–70 mg of caffeine (see our <a href="/matcha-caffeine">matcha caffeine breakdown</a>), so a couple of servings a day is a modest share of that reference — though it's worth counting all caffeinated drinks together, not matcha alone. People who are pregnant, caffeine-sensitive, or managing a health condition should talk to a healthcare provider about what's appropriate for them.
Does matcha go bad?
Matcha doesn't spoil but it does fade. Sealed tins keep peak flavor for about 6 months in a cool, dark place; once opened, finish within 4–6 weeks.
Sources
- L-theanine and caffeine in combination affect human cognition as evidenced by oscillatory alpha-band activity and attention task performance (Kelly et al., 2008) · Journal of Nutrition
- L-theanine, a natural constituent in tea, and its effect on mental state (Nobre et al., 2008) · Asia Pacific Journal of Clinical Nutrition
- Eisai (Zen Buddhism founder, 1141–1215) — returned from China in 1191 with tea seeds and composed the Kissa Yōjōki (Drink Tea to Improve Health and Prolong Life) in 1214 · Encyclopedia.com
- Spilling the Beans: How Much Caffeine Is Too Much? · U.S. Food and Drug Administration