Green tea has a reputation problem. Ask most people what it tastes like and they'll say "bitter" or "grassy, in a bad way." Ask a tea taster the same question and you'll hear about sweetness, umami, and the difference a single degree of water temperature can make.

This guide covers what green tea actually is, what the research says about its benefits, how the major styles differ, and — most usefully — how to brew it so it tastes the way it's supposed to: clean, savoury, faintly sweet, never bitter.

All tea — green, black, oolong, white — comes from the same plant, Camellia sinensis. What separates green tea from the rest is that the leaves are heated (steamed, in the Japanese tradition, or pan-fired, in the Chinese one) almost immediately after picking. This halts oxidation, which is why green tea keeps its fresh, vegetal character and pale colour instead of darkening into the deeper, maltier notes of black tea.

Because the leaf is barely processed, quality shows up fast. A good green tea tastes like a good vegetable — bright and sweet. A poor one, or one that's been brewed wrong, tastes like boiled spinach water.

Green tea's story begins in China, where legend credits its discovery to the mythical emperor Shennong around 2737 BCE, when tea leaves are said to have drifted into a pot of boiling water. Whether or not the legend is literal, China is where green tea production was refined over centuries, particularly the pan-firing techniques still used for styles like Long Jing today.

Green tea travelled to Japan in the 8th and 9th centuries with Buddhist monks studying in China, but it was the monk Eisai's return from China in 1191 — bringing both tea seeds and Zen Buddhism — that took root most firmly, eventually shaping the Japanese steaming tradition and the tea ceremony. India's own green tea story is more recent: production began in the colonial-era tea gardens of Assam and Darjeeling and expanded through the 20th century into Nilgiri and the Dooars, adapting Chinese and Japanese methods to Indian terroir.

Green tea's wellness reputation isn't just marketing — it's one of the more studied beverages in nutrition science. A few consistent findings:

•      Rich in catechins, particularly EGCG, a polyphenol antioxidant that has been widely studied for its role in cellular health.

•      Contains L-theanine, an amino acid that appears to smooth out caffeine's edge, which is why green tea's alertness feels steadier than coffee's.

•      Moderate, natural caffeine content — generally 20–45mg per cup, roughly a third to half of a cup of coffee.

•      Traditionally associated with supporting metabolism, heart health, and mental clarity as part of an overall healthy diet.

A note on all of the above: this is general information, not medical advice. Green tea is not a treatment for any condition, and its effects vary by person, dose, and overall diet. If you have a health condition, take medication, or are pregnant or breastfeeding, talk to your doctor before making tea a daily habit — particularly regarding caffeine intake.

Japanese Styles

Sencha

The everyday green tea of Japan — steamed, rolled into fine needles, grassy and slightly sweet. A reliable starting point if you're new to green tea.

Matcha

Shade-grown leaves stone-ground into powder and whisked into the water rather than steeped and strained. Concentrated, vegetal, and higher in caffeine than most other green teas since you consume the whole leaf.

Genmaicha

Green tea blended with roasted brown rice, some of which pops like popcorn during roasting. Nutty and comforting, with a naturally lower caffeine profile.

Chinese Styles

Long Jing (Dragon Well)

Pan-fired rather than steamed, giving it a toasted, chestnut-like sweetness instead of Japanese green tea's grassy edge. One of China's most celebrated green teas.

Gunpowder

Leaves rolled into small pellets that unfurl as they steep. Bolder and slightly smoky, and forgiving of less-than-precise brewing.

Indian Green Tea

India is best known for black tea, but its gardens also produce excellent green tea. High-elevation Darjeeling estates make small quantities of green tea alongside their famous black teas, prized for a delicate, floral character shaped by the region's altitude and cool climate. The Dooars, at the foothills of the Himalayas, produces a heartier, more full-bodied green tea. The Nilgiri hills in South India yield a style that's brighter and less vegetal than Chinese or Japanese green tea, with a clean, slightly fruity finish — a good entry point for anyone who finds classic green tea too grassy.

Two ArtTeas® green teas draw on this Nilgiri character: Long Jing, a Nilgiri green tea finished in the pan-fired Chinese style for a toasted, chestnut-like sweetness; and Green Mist, a Nilgiri green tea with a softer, misty, floral profile true to the hills it's grown in.

We also blend green tea with herbs and flowers for our wellness range — spearmint, rose, and hibiscus among them — and Yogi Tea, a green tea blended with ashwagandha, tulsi, gymnema, moringa, and nettle for a more grounding, herbal cup.

Bitterness in green tea is almost always a brewing problem, not a leaf problem. The two most common mistakes: water too hot, and steeping too long. Both over-extract the tannins that cause bitterness.

The basic method

•      Water temperature: 70–80°C (160–175°F) — well below boiling. If you only have boiling water, let it rest for 3–4 minutes before pouring.

•      Leaf quantity: roughly 2g (about 1 teaspoon) of loose leaf per 200ml cup.

•      Steep time: 2–3 minutes for most styles; matcha is whisked, not steeped, and gunpowder can handle slightly longer.

•      Re-steeping: quality loose leaf green tea often yields two or three infusions — add 30–60 seconds to each subsequent steep.

If a cup turns out bitter, the fix for next time is almost always to lower the water temperature or shorten the steep — not to use less leaf.

•      Loose leaf over tea bags: whole or lightly broken leaves hold more flavour and aroma than the dust and fannings typically used in bags.

•      Check the harvest date: green tea is at its best within the first year of picking, since its delicate compounds fade faster than black tea's.

•      Colour and aroma: good green tea leaf looks vividly green, not dull or yellowed, and smells fresh and grassy or toasty — not stale or fishy.

•      Origin transparency: a brand that names its garden or region is generally more accountable for quality than one that simply says "green tea."

•      Start with a lighter style: if you're new to green tea, a Sencha or Indian Nilgiri green tea is a gentler introduction than a more intense style like matcha or gunpowder.

Does green tea have caffeine?

Yes. Most green tea contains roughly 20–45mg of caffeine per cup, though matcha runs higher since the whole leaf is consumed rather than steeped and discarded.

What's the best time of day to drink green tea?

Late morning to mid-afternoon works well for most people, since the caffeine and L-theanine combination supports alertness without the jitteriness of coffee. Many people prefer to avoid it within a few hours of bedtime.

Can I drink green tea on an empty stomach?

Some people find it causes mild stomach discomfort on an empty stomach, largely due to its tannin content. If that's you, drink it after a light meal or snack instead.

Does green tea go bad?

It doesn't spoil the way food does, but it does lose flavour and aroma over time. Stored in an airtight container away from light, heat, and moisture, green tea is best enjoyed within 12 months of its harvest date.

Green tea vs. black tea — what's the real difference?

Processing, not plant. Green tea is heated soon after picking to prevent oxidation, preserving a lighter, grassier flavour and lower caffeine content. Black tea is fully oxidised, producing a darker colour, stronger flavour, and higher caffeine.

Is loose leaf green tea really better than tea bags?

In most cases, yes. Loose leaf tea is typically made from whole or large-broken leaves, which unfurl fully during steeping and release more complex flavour. Tea bags often contain smaller leaf particles (fannings or dust) that brew faster but with less nuance and a shorter shelf life for flavour.

Can green tea be cold brewed?

Yes, and it's a good way to avoid bitterness entirely. Add roughly 2g of loose leaf per 200ml of cold or room-temperature water and steep in the refrigerator for 4–8 hours, then strain. Cold brewing draws out sweetness and aroma while leaving behind more of the tannins that cause bitterness, so it's naturally smoother and slightly less caffeinated than a hot cup.

How should green tea be stored?

Keep it in an airtight container, away from light, heat, moisture, and strong odours — green tea leaf absorbs smells easily, so store it away from spices and coffee. A cool, dark cupboard works better than a spot near the stove or a sunny windowsill. Stored well, green tea holds its flavour for about 12 months from the harvest date.

Can green tea be brewed twice?

Yes — good loose leaf green tea is often at its best across two or three infusions rather than just one. After the first steep, add another 30–60 seconds to the second infusion and slightly more to the third, since the leaf releases flavour more slowly once partially spent.

ArtTeas® — hand-blended, single-origin tea from Assam, Darjeeling, and Nilgiri, with original watercolour art on every label.