Quick Answer
To brew green tea properly, heat fresh water to 70–80°C (158–176°F) — never use fully boiling water, which scorches the leaves and makes the tea bitter. Use about one teaspoon (2–3 grams) of loose leaf or one tea bag per 250 ml cup, and steep for 1–3 minutes depending on the tea type. Japanese green teas like sencha need cooler water and shorter steeps, while Chinese varieties like dragon well tolerate slightly hotter water. Pour, sip, and enjoy a fresh, grassy cup without any bitterness.
Why Water Temperature Is the Most Important Factor
Green tea is made from unoxidised tea leaves, which are far more delicate than the fully oxidised leaves used for black tea. When you pour boiling water (100°C / 212°F) over green tea leaves, it extracts excessive tannins and bitter compounds, destroying the fresh, vegetal sweetness that makes green tea so appealing. This single mistake is responsible for nearly every bad cup of green tea anyone has ever made.
The sweet spot for most green teas is 70–80°C (158–176°F). At this temperature, the water coaxes out the amino acids (especially L-theanine, which gives green tea its savoury, umami depth) and aromatic compounds while leaving most of the harsh, bitter catechins locked in the leaf. The result is a smooth, lightly sweet, slightly grassy cup — exactly what the tea is supposed to taste like.
If you do not own a variable-temperature kettle, there is an easy workaround. Boil the kettle, then leave it open for about 3–5 minutes. The water will fall to roughly 80°C (176°F) on its own. You can also transfer the boiling water to a cold mug or teapot first — the heat lost to the cool ceramic brings the temperature down into the right range. A kitchen thermometer is the most accurate option, but after a few brews you will develop a feel for it.
Equipment You Actually Need (and What You Don’t)
Brewing great green tea does not require a cupboard full of specialist kit. Here is what matters:
The essentials
- A kettle with temperature control (ideal but optional). Variable-temperature kettles from brands regularly reviewed by [Which?](https://www.which.co.uk/) make hitting 75°C effortless. A standard kettle works fine if you let the water cool first.
- A teapot or brewing vessel. Glass or porcelain is best because it does not absorb flavours. Avoid cast iron unless it is enamelled on the inside.
- An infuser or strainer. For loose leaf tea, a basket infuser gives the leaves room to expand — cramped tea balls restrict the leaves and weaken the flavour.
- A kitchen scale or measuring spoon. Consistency matters more than precision; roughly 2–3 grams per 250 ml cup is the standard ratio.
Nice to have
- A thermometer. Takes the guesswork out of water temperature.
- Small cups. Green tea cools quickly in a large mug, and the flavour shifts as it cools. Smaller cups keep each pour at the right drinking temperature.
Loose Leaf vs Tea Bags: Which Should You Choose?
Both can make a perfectly good cup, but loose leaf generally wins on flavour. Whole loose leaves have more surface area exposed and room to unfurl, releasing a fuller, more complex flavour. Tea bags usually contain smaller, broken leaf particles (often called “dust and fannings”), which brew faster but can taste flatter and slightly more astringent.
That said, there is no need to feel guilty about using bags. A decent-quality green tea bag brewed at the right temperature and for the right time will comfortably beat a poorly brewed expensive loose leaf. If you use bags, choose brands that use whole-leaf pyramid sachets where possible, and reduce the steep time slightly (1–2 minutes) because the finer particles infuse faster.
| Factor | Loose leaf | Tea bags |
|—|—|—|
| Flavour complexity | Higher — whole leaves, more nuance | Good, but often flatter |
| Steep time | 2–3 minutes | 1–2 minutes |
| Cost per cup | Often cheaper per gram for quality tea | Convenient, usually slightly pricier |
| Re-steeping | Excellent — 2–3 good infusions | One decent cup, occasionally a second |
| Convenience | Needs an infuser and a little practice | Fast and fuss-free |
How to Brew Green Tea: Step-by-Step
1. Measure your tea
Add one teaspoon (about 2–3 grams) of loose leaf green tea per 250 ml of water. For a standard one-litre teapot, that is roughly 4 teaspoons. If you are using bags, one bag per mug is the norm.
2. Heat the water to the right temperature
Bring fresh, cold water to the boil, then let it cool to 70–80°C (158–176°F). If your kettle has temperature settings, select 75°C. Delicate Japanese teas (gyokuro, sencha) prefer the cooler end of the range; heartier Chinese teas (dragon well, gunpowder) are happier at the warmer end.
3. Warm the teapot and cups
Pour a little of the hot water into the empty teapot and cups, swirl it around, and discard it. This prevents the brewing water from cooling too much on contact and keeps the tea at a stable temperature.
4. Add the tea and pour the water
Place the measured tea in the warmed pot, then pour the water over the leaves in a slow, circular motion. This gently agitates the leaves and ensures even extraction.
5. Steep for the correct time
Start your timer. As a general rule, 2 minutes works for most green teas — but check the specific times by tea type below. Under-steeping gives a weak cup; over-steeping is the classic route to bitterness.
6. Strain and serve immediately
Remove the leaves (or the bag) as soon as the timer goes off. Do not leave the tea sitting on the leaves, or it will keep extracting and turn bitter. Pour into cups and drink within a few minutes for the best flavour.
7. Re-steep if you like
Good-quality loose leaf green tea can be re-steeped 2–3 times. Increase the steep time by about 30 seconds for each subsequent infusion, and nudge the water temperature up slightly for the third steep.
Steep Times and Temperatures by Tea Type
Different green teas have different characters. Use this table as your starting point, then adjust to taste.
| Tea type | Origin | Water temperature | Leaf amount per 250 ml | Steep time |
|—|—|—|—|—|
| Sencha | Japan | 70–75°C (158–167°F) | 2–3 g | 1–2 minutes |
| Gyokuro | Japan | 50–60°C (122–140°F) | 4–5 g | 2 minutes |
| Dragon well (Longjing) | China | 75–80°C (167–176°F) | 3 g | 2–3 minutes |
| Gunpowder | China | 80°C (176°F) | 2 g | 2–3 minutes |
| Jasmine green | China | 75°C (167°F) | 2–3 g | 2 minutes |
| Standard green tea bag | Various | 75–80°C (167–176°F) | 1 bag | 1–2 minutes |
Notice how gyokuro, a premium shade-grown Japanese tea, wants remarkably cool water — barely warmer than a hot bath. Brewing it at 80°C would scorch it completely. The rule of thumb is simple: the more delicate and higher-grade the tea, the cooler the water and the shorter the steep.
Common Green Tea Mistakes (and How to Fix Them)
Most disappointing cups of green tea come down to one of these five errors. The good news is that every one of them is easy to fix.
| Mistake | What goes wrong | The fix |
|—|—|—|
| Using boiling water | Scorched leaves, harsh bitterness | Cool water to 70–80°C before pouring |
| Steeping too long | Over-extraction of tannins | Set a timer; 2 minutes for most teas |
| Too much leaf | Overpowering, astringent cup | Stick to 2–3 g per 250 ml |
| Leaving the bag in | Tea keeps extracting while you drink | Remove the bag or leaves on time |
| Reboiling old water | Flat, lifeless flavour from deoxygenated water | Always start with fresh, cold water |
If your green tea tastes bitter, the culprit is almost always temperature or time — try cooler water first, since that single change fixes the problem nine times out of ten.
How Much Caffeine Is in Green Tea?
Green tea contains caffeine, but noticeably less than coffee. A typical 250 ml cup of green tea brewed from loose leaf contains roughly 30–50 mg of caffeine, compared with around 95 mg in the same amount of brewed coffee and 25–50 mg in a cup of black tea (which varies widely). Tea bags on the lower-quality end can dip below 30 mg, while strong brews of matcha can climb above 60 mg.
It is also worth knowing that caffeine in tea behaves a little differently from caffeine in coffee. The amino acid L-theanine, found naturally in tea, appears to smooth out the stimulating effect — many people describe green tea as giving calm, focused alertness rather than the jittery buzz of a strong espresso. If you are sensitive to caffeine, the [NHS](https://www.nhs.uk/) advises keeping total daily intake moderate and avoiding caffeinated drinks close to bedtime.
For reference: a standard green tea bag steeped for 2 minutes delivers roughly one-third of the caffeine of a small filter coffee. You would need to drink three cups of green tea to match one average coffee — useful context if you are cutting down but still want your morning ritual.
How to Make Iced Green Tea
Iced green tea is wonderfully refreshing in summer and uses the same principles as hot brewing. There are two reliable methods:
The quick method (hot brew, then chill)
- Brew double-strength green tea: use twice the leaf (4–5 g per 250 ml) at 75°C for 2 minutes.
- Strain into a heatproof jug and let it cool to room temperature.
- Refrigerate for at least 2 hours, then serve over plenty of ice.
- Add lemon, mint, or a little honey if you like — but taste it plain first.
The cold brew method (smoother, less bitter)
- Add 4–5 grams of loose leaf green tea to a 1-litre bottle or jug of cold, filtered water.
- Refrigerate for 6–8 hours or overnight.
- Strain out the leaves and serve over ice.
Cold brewing extracts far fewer bitter compounds, so the result is naturally sweeter and smoother — many people who think they dislike green tea change their minds after trying the cold-brewed version. It also works beautifully with flavoured green teas, such as lemon or jasmine. Store cold-brewed tea in the fridge and drink it within 2–3 days.
A Quick Note on Matcha
Matcha is technically green tea, but it is prepared completely differently. Instead of steeping leaves and removing them, you whisk finely ground whole-leaf powder directly into hot water (around 70–80°C) using a bamboo whisk. Because you consume the entire leaf, matcha delivers more caffeine and more antioxidants per cup than steeped green tea — and its flavour is richer, creamier, and more intensely savoury. If you enjoy green tea’s grassy notes, matcha is well worth trying, but treat it as a separate ritual rather than a brewing variation.
Storing Green Tea Properly
Green tea goes stale faster than any other tea type because its delicate aromatic compounds oxidise quickly once exposed to air, light, heat, and moisture. Buy in small quantities — 50 to 100 grams at a time is plenty for most households — and store it in an airtight, opaque container away from the cooker, the kettle’s steam, and strong-smelling foods like coffee or spices. The fridge seems like a good idea but is actually a poor choice unless the tea is sealed airtight, because condensation forms every time you open the container. Kept properly at cool room temperature, green tea stays at its best for about 6 months after opening; after that it is still safe to drink, but the fresh, grassy top notes fade and the cup tastes flat. If your tea has lost its aroma, try cold brewing it — the method is forgiving of slightly past-their-prime leaves.
Frequently Asked Questions
How hot should the water be for green tea?
Aim for 70–80°C (158–176°F) for most green teas. Delicate Japanese teas like sencha and gyokuro prefer the cooler end (50–75°C), while robust Chinese teas like gunpowder are fine at 80°C. Never pour fully boiling water over green tea leaves — it scorches them and creates bitterness.
Why does my green tea taste bitter?
Bitterness almost always comes from water that is too hot or a steep time that is too long. Cool your water to 70–80°C, reduce the steep to 1–2 minutes, and make sure you remove the leaves or bag promptly. Using too much leaf for the amount of water has the same effect, so measure roughly 2–3 grams per 250 ml cup.
Can you put milk in green tea?
You can, but it is not traditional and it mutes the delicate flavours that make green tea special. Most green tea is best drunk plain or with a little honey or lemon. If you prefer a milky tea, black tea is the better choice — its stronger, maltier flavour stands up to milk far better.
How many times can you re-steep green tea?
Good-quality loose leaf green tea can be re-steeped 2–3 times with excellent results. The second infusion is often considered the sweetest. Add about 30 seconds to the steep time for each round, and use slightly warmer water for the final infusion. Tea bags usually manage one good cup and occasionally a passable second.
Does green tea have less caffeine than coffee?
Yes — roughly one-third as much. A 250 ml cup of green tea contains about 30–50 mg of caffeine compared with around 95 mg in the same amount of brewed coffee. The presence of L-theanine also gives tea’s caffeine a calmer, more focused feel than coffee’s sharper kick.
Key Takeaways
- Keep water at 70–80°C (158–176°F) — boiling water is the number-one cause of bitter green tea.
- Use 2–3 grams of leaf (or one bag) per 250 ml cup and steep for 1–3 minutes, following the timing for your specific tea type.
- Remove the leaves or bag as soon as the timer finishes to stop over-extraction.
- Good loose leaf can be re-steeped 2–3 times, with the second infusion often the best.
- Green tea has roughly one-third the caffeine of coffee, with a calmer, more focused effect thanks to L-theanine.
- Try cold brewing for a naturally sweeter, smoother glass with almost no bitterness.
