What Is Green Tea? How It's Made, Types, Flavor & Brewing

What Is Green Tea? How It's Made, Types, Flavor & Brewing

All traditional Teas, including green, black, oolong, and other Teas, are made from the leaves of the Camellia sinensis plant. Green Tea is made by heating those leaves relatively soon after harvest to limit oxidation, the chemical reactions that gradually change the color, aroma, and flavor of freshly picked tea leaves.

That basic process distinguishes Green Tea from more heavily oxidized Teas such as Black Tea. But Green Tea is not a single type or flavor. Depending on where and how it is grown and processed, it can be fresh and vegetal, sweet and nutty, floral, savory, or deeply roasted.

To understand why there is so much variation, it helps to know a little about how people have made and drunk Tea over the centuries.

Where Did Green Tea Come From?

Tea drinking developed in China long before anyone divided Tea neatly into the categories we use today. By the Tang dynasty (618–907), Tea was widely consumed, and around 760 the scholar Lu Yu wrote The Classic of Tea, the earliest known book devoted entirely to Tea and its cultivation, preparation, and appreciation. The Smithsonian's National Museum of Asian Art describes Tea as deeply embedded in Chinese life by this period.

The way people prepared Tea continued to change. During the Song dynasty (960–1279), powdered Tea whisked with hot water became prominent. That tradition traveled to Japan, where Buddhist monks returning from China helped establish the powdered Tea practices that eventually developed into chanoyu, the Japanese Tea ceremony associated today with matcha. The Kyoto National Museum traces this connection between Chinese Tea culture and the development of Tea traditions in Japan.

During China's Ming dynasty (1368–1644), steeping loose leaves became increasingly important. Loose-leaf Tea culture also influenced Japan, where producers eventually developed distinctive methods of making Sencha. By the eighteenth century, Tea makers around Uji were refining methods of steaming, rolling, and drying freshly harvested leaves that helped establish the Japanese Sencha tradition.

Tea culture ultimately spread much further than China and Japan. Different traditions developed across Korea and other parts of Asia, while expanding global trade carried Tea into Europe and North America beginning in the seventeenth century. Cultivation later expanded to places including India and Sri Lanka, helping transform Tea into one of the world's most widely consumed beverages.

That history still appears in the Green Teas we drink today. Matcha reflects the powdered Tea tradition that traveled from China to Japan. Sencha represents a later Japanese tradition of steeped whole-leaf Tea, while Chinese loose-leaf Green Teas developed along another path. Together, they reflect centuries of different places, processing methods, and ways of preparing Tea.

How Is Green Tea Made?

Once Tea leaves are picked, they begin to change.

When the leaves are handled, rolled, or bruised, compounds inside the leaf come into contact with oxygen and begin a series of chemical reactions known as oxidation. These reactions gradually change the color, aroma, and flavor of the Tea.

A cut apple turning brown offers a familiar comparison. Tea leaves also change through oxidation, although the chemistry isn't exactly the same.

To make Green Tea, producers limit this process relatively early by heating the leaves. The heat deactivates the enzymes responsible for much of the oxidation, preserving more of the fresh character of the leaf. The leaves are then typically shaped or rolled and dried. Research on Green Tea processing describes this early heating step as one of the fundamental distinctions between Green Tea and more heavily oxidized Teas.

How that heating is done also matters.

Steamed or Pan-Fired

Japanese Green Teas such as Sencha are commonly heated with steam. Steaming can produce Teas with fresh, vegetal, grassy, savory, and sometimes marine characteristics.

Many Chinese Green Teas are instead heated using dry heat, including pan-firing. These methods can produce smoother, nuttier, toasted, or gently sweet characteristics.

These aren't absolute rules. Some Japanese Green Teas, such as Kamairicha, are pan-fired, and processing varies considerably among individual Teas. But the distinction between steaming and dry heating helps explain some of the differences you encounter across Green Tea.

What Are the Main Types of Green Tea?

There are hundreds of individual Green Teas, regional traditions, and processing styles. A few well-known examples provide a useful introduction to the range.

Sencha is the most familiar style of Japanese loose-leaf Green Tea. It is typically steamed after harvest and can range from light and refreshing to deeply vegetal, savory, and umami-rich.

Matcha is powdered Japanese Green Tea. The plants are shaded before harvest, and the processed leaves used to make matcha are ground into a fine powder. Unlike steeped Tea, the powdered leaf itself is whisked into water and consumed.

Longjing, commonly known as Dragon Well, is one of China's best-known Green Teas. Traditionally pan-fired, it is often associated with a smooth texture and gently toasted or chestnut-like character.

Yun Wu, or Cloud Mist, refers to Chinese Green Teas associated with mountainous, misty growing regions rather than one universally standardized Tea. Individual Yun Wu Teas vary according to their origin and production.

Hojicha takes Green Tea in another direction. It is a Japanese Tea made by roasting Green Tea leaves, stems, or both after their initial processing. Roasting changes both the color and flavor of the Tea, producing warm, toasted characteristics that can seem far removed from the grassy flavors people often associate with Green Tea.

These are only a few examples, but they provide a sense of how broad the category can be.

What Does Green Tea Taste Like?

Green Tea is often described as grassy, but that describes only one part of its flavor range.

Depending on where and how the Tea is grown and processed, Green Tea can be vegetal, sweet, nutty, toasted, floral, savory, marine, buttery, or lightly astringent. A steamed Japanese Sencha can taste remarkably different from a pan-fired Chinese Green Tea, while roasted Hojicha occupies another part of the spectrum entirely.

Botanical ingredients can take those underlying flavors in still other directions. B. Fuller's Green Tea blends pair different styles of Green Tea with fruits, herbs, flowers, spices, and other botanicals, allowing the character of the underlying Tea to remain part of the finished cup.

• Lemon Ginger Green begins with Chinese Yun Wu and adds ginger and lemon peel, giving the Tea a brighter, spicier character.

• Sencha Candy starts with Japanese Sencha from Saga Prefecture and combines it with lavender and vanilla, creating a softer, buttery cup with notes reminiscent of butterscotch or toffee.

• Twiggy Cha begins with roasted Hojicha and pairs it with chocolate and orange, producing a warmer, toastier cup.

All three begin with Green Tea, but the underlying Teas and the botanicals paired with them produce very different results. Trying different styles is often more useful than deciding whether you like "Green Tea" as a category.

Does Green Tea Have Caffeine?

Yes, Green Tea naturally contains caffeine, although on average about 20% of the caffeine in a cup of drip coffee.

According to the U.S. Food and Drug Administration's caffeine estimates, a typical 12-ounce serving contains approximately:

These numbers are useful comparisons rather than fixed amounts. The caffeine in an individual cup depends on the inherent caffeine content of the variety or sub-variety of the Tea plant itself, how much leaf is used, and how it is prepared. Water temperature and steeping time can also affect how much caffeine is extracted into the cup.

Some Green Teas can also depart substantially from the average. Matcha, for example, is prepared by consuming powdered tea leaf rather than steeping leaves and removing them, so it usually has substantially higher levels of caffeine than other Green Teas; some studies suggest in the 100 - 125 mg range.

Theanine is another chemical compound found in Tea, which will modify an moderate the effects of caffeine in the brain and nervous system, so it should also be taken into account when considering the effects of caffeine in the body. But that is a subject for another post.

The practical takeaway is simple: Green Tea contains caffeine, but a typical cup generally contains substantially less than a similarly sized cup of brewed coffee. It should not, however, be treated as caffeine-free.

How to Brew Green Tea

Green Tea generally benefits from cooler water than Black Tea, but "use cooler water" is only a starting point. Different Green Teas respond differently to temperature and steeping time.

Sencha, Dragon Well, and Hojicha illustrate how much brewing can vary within the category.

These are starting points rather than fixed rules. The individual Tea, amount of leaf, and your own preference should determine the final cup.

Brewing Sencha

Sencha generally rewards cooler water. Start around 150–170°F and steep for one to two minutes.

Lower temperatures can emphasize sweetness and savory character while keeping excessive bitterness and astringency in check. More delicate Senchas may benefit from temperatures toward the lower end of that range.

Guidance from the Global Japanese Tea Association similarly illustrates how Japanese Green Teas can be brewed at relatively low temperatures when the goal is to emphasize sweetness and umami.

Brewing Dragon Well

Dragon Well can generally take somewhat warmer water than Sencha. Start around 175–185°F and steep for about three to four minutes.

Its pan-fired character tends toward smoother, nuttier, and gently toasted flavors rather than the pronounced vegetal character associated with many steamed Japanese Teas. Moderately hot water provides a useful starting point without immediately pushing extraction too far.

Brewing Hojicha

Hojicha can take considerably hotter water. Start around 190–205°F, with a relatively short infusion of roughly one to two minutes, depending on the Tea and the strength you prefer.

Because Hojicha has been roasted, its brewing behavior and flavor are quite different from a delicate Sencha. Hotter water readily brings out its warm, toasted aroma.

The contrast among the three is useful because Green Tea does not always mean low-temperature water. A delicate steamed Sencha may reward cooler water and careful timing. A pan-fired Dragon Well sits somewhere in the middle. A roasted Hojicha can comfortably take water close to boiling.

If your Green Tea tastes excessively bitter or harsh, start by lowering the water temperature or shortening the steep. If it tastes weak, try using a little more Tea rather than simply leaving the leaves in the water much longer.

The best brewing instructions are ultimately a starting point. The Tea itself—and your palate—should determine what happens next.

That is part of what makes Green Tea worth exploring. Sencha, Dragon Well, Hojicha, and the many styles beyond them can differ substantially in flavor and preparation, so one cup rarely represents the category as a whole.

The best way to understand Green Tea is to try different styles and pay attention to what you enjoy. For more on Green Tea, see how processing shapes its flavor and how to brew it without making it bitter.