Green TeaGuide
Why Is My Green Tea Bitter? 7 Causes and How to Fix Each
Bitter green tea is almost always a brewing problem, not the tea's fault. The usual causes are water that's too hot (boiling water scorches delicate leaves), steeping too long, too much leaf, stale or low-grade tea, broken leaf, and hard water. Green tea has no oxidation or long withering to soften its bitter compounds, so it punishes mistakes more than any other tea. The fix: water at 75–85 °C (cooler for buds, warmer for bigger leaves), short steeps, weighed leaf and fresh, whole-leaf tea.
I'll be honest: for years I was sure I didn't like green tea. Every cup I made tasted like bitter boiled spinach. I blamed the tea, then my taste buds. The problem, it turned out, was me: I was using water straight off the boil and leaving the leaves in for five minutes. The first time a friend made me a Longjing at 80 °C with a short steep, I realized I'd never tasted green tea properly. Here's everything I wish I'd known.
Why green tea turns bitter so easily#
Green tea is heated right after picking to stop oxidation. That keeps it fresh and green, but it also keeps most of the catechins (the main bitter and astringent compounds) intact. Oolong, red and dark teas go through stages that transform some of these compounds; green tea doesn't. Hot water and long contact pull them out quickly, and caffeine adds to the bitterness. That's why the same leaf can taste sweet at 80 °C for 20 seconds and harsh at 100 °C for 3 minutes.
The 7 causes, and how to fix each#
| # | Cause | Fix |
|---|---|---|
| 1 | Water too hot | 75–85 °C; lower for buds, higher for large leaves |
| 2 | Steeping too long | Gongfu 10–20 s; Western 1.5 min max |
| 3 | Too much leaf | Weigh: 4–5 g per 100 ml gongfu, 2–3 g per 250 ml Western |
| 4 | Stale tea | Buy recent spring harvests; store airtight, dark, cool; drink within a year |
| 5 | Low-grade or broken leaf | Choose whole leaf; avoid dust and fannings |
| 6 | Hard water | Filtered or soft bottled water |
| 7 | Leaves left stewing | Lid off between steeps; pour off fully; don't leave leaves in the mug |
1. Water too hot#
The most common mistake by far. Boiling water scorches tender leaves and extracts bitterness fast. Blog and shop advice varies, and you'll see anything from 60 to 90 °C recommended. The truth is a range: bud-heavy teas prefer the cooler end, 70–80 °C for Bi Luo Chun and 75–80 °C for pre-Qingming Longjing; larger-leaf teas like Tai Ping Hou Kui can take 80–85 °C, and Lu An Gua Pian about 80 °C.
No thermometer? Let boiled water stand with the lid open for about 10 minutes to reach roughly 75–80 °C, or pour it into a pitcher and then into the gaiwan, which drops it several degrees each time. A kettle with temperature settings makes life much easier: see best kettle for tea.
2. Steeping too long#
In a mug or pot, green tea shouldn't steep longer than about 1.5 minutes. In gongfu, start around 15 seconds. Take the leaves out, or pour off all the tea.
3. Too much leaf#
Green teas vary enormously in volume: a teaspoon of Longjing and a teaspoon of Bi Luo Chun weigh very different amounts. Weigh the leaf. Full numbers in the gongfu brewing chart.
4. Stale tea#
Green tea is the most fragile type of tea. Light, heat, moisture and smells destroy its freshness quickly; in a clear jar on a sunny shelf it can taste of hay within weeks. Stale green tea is dull and bitter at any temperature.
5. Low-grade or broken leaf#
Good green tea is made from buds and young leaves, whole and even. Old, coarse leaves, stems and dust give a harsher, flatter cup. Broken pieces extract too fast.
6. Hard water#
Mineral-heavy water dulls aroma and can make tea taste sharper and flatter. Filtered or soft bottled water makes a big difference: see water for tea.
7. Leaves left stewing#
In a gaiwan, a closed lid between steeps traps heat and "cooks" the leaves. Leave it off or tilted. In a mug, don't leave the leaves in, unless you're brewing grandpa style with very little leaf.
My side-by-side: the same tea, right and wrong#
Good bitterness vs bad bitterness#
Not all bitterness is a mistake. Some green teas, like Zhu Ye Qing or Lu An Gua Pian, have a gentle bitter edge by nature. The difference:
- Good bitterness is light, clean, and turns into sweetness in your throat within seconds (Chinese drinkers call this hui gan, returning sweetness).
- Bad bitterness is harsh, lingering and drying, and doesn't turn sweet.
Green teas that are hardest to make bitter#
If you want a forgiving green tea while you practise: Anji Bai Cha, Huangshan Mao Feng, and a good Longjing at 80 °C. Or try cold brew, which extracts very little bitterness: see cold brew tea (keep green tea to 4–6 hours).
One more tip#
Don't drink strong green tea on an empty stomach. Many people find it unpleasant, and Chinese tea drinkers traditionally advise against it.
My honest take#
Before you give up on green tea, make one cup properly: fresh spring leaf, weighed, water at 80 °C, a short steep. If it's still bitter, then it's the tea. Nine times out of ten, it won't be.
The bottom line#
Bitter green tea almost always comes from hot water, long steeps, too much leaf, stale or broken tea, or hard water. Cool the water to 75–85 °C, shorten the steep, weigh the leaf, and buy fresh whole-leaf tea. More in my Chinese green tea guide.
Questions people ask
Why is my green tea so bitter?
Usually because the water is too hot, the steep is too long, or there's too much leaf. Stale tea and hard water also cause bitterness.
What temperature should green tea be brewed at?
75–85 °C: cooler for bud-heavy teas, warmer for larger leaves.
How long should I steep green tea?
In a mug, 1.5 minutes at most. Gongfu, start around 15 seconds.
How do I make green tea without a thermometer?
Let boiled water stand with the lid open for about 10 minutes, or pour it into another vessel first to cool it.
Is some bitterness normal in green tea?
A light bitterness that quickly turns sweet is normal and even valued. Harsh, lingering bitterness is a brewing or quality problem.