What Is Matcha? A Complete, Honest Guide

Everything you need to know about matcha in one article! Understand what sets it apart from other green teas, how quality is measured, where it comes from, and what the research about its health benefits says.

Let's Get Started With Matcha

• Matcha is finely milled whole-leaf green tea: as opposed to an infusion, you consume the whole leaf which is referred to as suspension.
• The shading, harvest, steaming, and milling process determines the quality far more than the origin.
• China is where green tea cultivation began and ground tea was invented; Japan refined those practices into a their own traditions.
• Caffeine content in matcha is real and measurable; L-theanine claims are still under active research.
• Color, aroma, and texture are reliable quality indicators that can be tested at home.
• Most grade labels ("ceremonial," "culinary") are marketing terms, not regulated categories.

You've seen the tins everywhere. Matcha lattes, matcha shots, matcha supplements in capsules. The prices range from 5€ to well over 100€ for this green powder. Some brands tell you it's "the Japanese secret to calm focus." Others promise weight loss. Almost none of them explain what matcha actually is or why any of those claims deserve scrutiny.

This guide aims to dive deeper and answer some of the questions with a more critical lens. It covers the process that makes matcha distinct from every other green tea, what the research genuinely supports and what it overstates, why quality varies so dramatically, and addresses Japan and China's shared history of the green powder. More Cha sources matcha from Hangzhou and Guizhou, so we have a particular interest in being honest about the China question.

The Magical Green Powder

The process that produces matcha is specific in a way that distinguishes it from every other green tea. Understanding those specifics is what lets you evaluate quality and recognize when you're being sold something that doesn't meet them.

Shading changes the plant's chemistry. In the weeks before harvest, the tea plants are covered (traditionally with reed screens or fabric) to reduce their exposure to direct sunlight. The plant responds by producing more chlorophyll (the compound that gives good matcha its vivid green) and more L-theanine (an amino acid). At the same time, the balance of compounds in the leaf changes: catechins (responsible for the bitterness and astringency in tea) become less dominant [1, 3]. That's how high quality matcha develops a smooth, savory umami taste and a fresh leafy character instead of tasting sharply bitter.

First Harvest matcha leaves are of the highest quality. Labels such as “first harvest” or “first flush” indicate that the tea was made from the earliest leaves of the season, usually picked in spring. These young leaves contain more amino acids, especially L-theanine, and fewer bitter compounds than later harvests. This is what gives the tea a smoother, sweeter, and more umami-rich flavor. Matcha made from second or later harvests can still be good but typically tastes more bitter and astringent, which is why they are often used for cooking rather than traditional tea preparation.

Steaming, not pan-firing. Most Chinese green teas are pan-fired to stop oxidation after harvest. Japanese green tea, called Sencha on the other hand is grown in full sunlight, harvested, and then quickly steamed to stop oxidation. The same method of steaming is applied to matcha leaves. This difference in heat application produces a different flavor profile: grassier, more vegetal, less toasty [1, 3].

Destemming and deveing. After steaming and drying, the leaf material is separated from the stems and veins. These are removed because they would contribute bitterness and rougher texture to the final powder. What remains is the flat, dried leaf flesh. This is what gets milled [1].

Stone milling. Tencha is ground slowly between granite stones. The slowness is deliberate: fast mechanical grinding generates heat, which degrades both flavor compounds and colour. Authentic matcha milled this way has a fine, smooth texture [1, 8].

Suspension, not infusion. When you prepare matcha, you are not steeping leaves and discarding them. You are drinking a suspension of milled leaf particles. You consume the whole leaf. This affects how compounds from the leaf reach you, and it's why matcha behaves differently in the body compared to conventional brewed green tea (though the full implications of this are still being studied) [3, 4].

Skipping any of these steps or performing them poorly producesa cheap green tea powder. These often skip shading entirely, use mechanical high-speed grinding, and include stems. The color is yellow or brown and the taste is bitter [1, 8].

What the Research Actually Says (And What It Doesn't)

Matcha's health reputation has outrun its evidence base and many statements are exagerated for marketing purposes.

What is well established

Matcha contains caffeine. This is not surprising as many other teas also contain caffeine. The caffeine content is real and measurable. Research demonstrates that matcha delivers caffeine in a meaningful amount per serving, generally higher per gram than conventional brewed green tea [1, 4]. 

Matcha contains L-theanine, an amino acid that occurs naturally in tea plants. L-theanine is present in all green teas, but shading increases its concentration. This is one of the measurable effects of the production process described above [1, 9].

What is still under active research

The claim that L-theanine "softens" the caffeine effect or produces a distinct quality of alertness is widely repeated. It is based on plausible mechanisms and some human trials. The European Food Safety Authority has not approved any health claim connecting L-theanine to alertness, focus, relaxation, or cognitive performance at the time of writing. Early findings indicate a direction of effect worth studying, but the evidence does not yet support definitive claims [4].

Matcha contains catechins and phenolic compounds that have antioxidant activity in biochemical terms. But "antioxidant" has become a marketing word that implies more certainty than the clinical evidence supports [1, 3].

What we know with confidence: matcha is a whole-leaf green tea with a measurable caffeine content, a higher amino acid profile than most green teas due to shading, and a compound composition that a growing body of research finds interesting for multiple reasons. 

Where Matcha Comes From

The Chinese origins of green tea and ground tea. Tea cultivation in China's Zhejiang province, where Hangzhou is also located, has a documented history spanning more than a thousand years. Hangzhou's Longjing region is one of China's most significant tea-producing areas, and the broader region's tea culture predates the Japanese ceremonial tradition by centuries. [1].

Powedered tea is also a tradition that began in China and is much older than modern matcha and can be traced back to tea culture in China. During the Song dynasty (960–1279), tea leaves were often steamed, dried, and ground into a fine powder that was whisked with hot water in a bowl but was likely brown in colour. The practice later traveled to Japan with Zen Buddhist monks in the 12th century and eventually evolved into the matcha preparation used in Japanese tea ceremonies today.

What Japan received and transformed was a practice that began in China and remained a living tradition there even as Japan developed its own distinct version 

What this means for choosing matcha. A well-shaded, properly processed, stone-milled tencha from Hangzhou produces a different cup than an identically processed one from Guizhou — the same way Uji and Yame produce different cups despite both being Japanese. The question to ask about any matcha is not "is it Japanese?" but "was it grown with adequate shading, harvested at the right moment, and milled correctly?"

How to Assess Quality Yourself

Grade labels on matcha tins — "ceremonial," "premium," "culinary" — are not regulated categories. Some brands use "ceremonial" for genuinely high-grade matcha but there are no standards in place to assure the quality of the matcha.

What you can assess reliably:

Color. High-quality matcha is vivid green, almost luminescent against a white bowl. The green comes from chlorophyll preserved through proper shading, steaming, and low-heat milling. A dull yellowish powder signals inadequate shading, overheating during milling, or age. Color is the single fastest quality indicator before you open a tin. 

Aroma. Good matcha smells distinctly vegetal and grassy, sometimes with a note that gets described as fresh hay or marine. This is the smell of preserved chlorophyll and amino acids. A flat, dusty, or astringent smell indicates degradation or low-grade material.

Texture. Rub a small amount between your fingers. Quality matcha is very fine and silky, it should almost disappear into your skin rather than sitting on it. Coarse, gritty texture indicates either high-speed milling or the inclusion of stems.

Quality Indicators at a Glance

More Cha's Hangzhou and Guizhou matcha are available to try individually or as a set to start your own little matcha café at home.

Every sold tin contributes 50 cents to educational projects through Stiftung Bildung, a small connection between a daily habit and something that outlasts the cup of matcha.