Most guides to making tea give you the same table: hot water, a few minutes, done. Copy it out, laminate it, and you'll get a decent cup most of the time.
None of them mention that the water coming out of your tap in Sligo behaves differently to the water in Dublin, and that difference is quietly ruining more cups of tea than getting the timing wrong ever will.
This guide gives you the table everyone else has. Then it gives you the part they leave out.
Brewing Times by Type of Tea
If you only read one section, read this one.
| Tea type | Water temperature | Amount per cup | Steep time |
|---|---|---|---|
| Black tea | Just off the boil (100°C) | 1 tsp, or 1 bag | 3 to 5 minutes |
| Green tea | 75 to 80°C | 1 tsp | 2 to 3 minutes |
| White tea | 75 to 80°C | 1½ tsp | 3 to 4 minutes |
| Oolong | 85 to 95°C | 1 tsp | 3 to 4 minutes |
| Herbal and rooibos | Full boil (100°C) | 1 to 2 tsp | 5 to 7 minutes |
Amounts assume loose leaf unless a bag is specified.
Everything below explains why those numbers hold, where they fall apart, and what actually separates a good cup from a forgettable one.
Loose-Leaf Tea vs a Tea Bag
Before you get to brewing times, it's worth settling the loose leaf versus tea bag question, because it changes every number in the table above.
A standard tea bag is built for speed, not flavour. The tea leaves inside are usually broken down into small fragments, sometimes called fannings or dust, which extract fast because there's more surface area exposed to the water. That's exactly why a tea bag can taste bitter within minutes when the same leaf, at the same length of time, would still taste balanced. It unfurls more slowly and releases flavour in a way that's harder to rush past.
This matters more for some teas than others. Bolder categories cope fine in bag form, herbal blends included, since their flavour profile is strong enough to survive the shortcut. More delicate ones lose the most when confined to a bag, because the notes that make them worth drinking need room for the leaf to expand.
If you're doing this often, an infuser or a simple mesh strainer earns its place fast. If you're not there yet, a decent tea bag is not something to feel guilty about. It's a different tool for a different moment, not a lesser one.
Getting Black Tea Right
This one is forgiving on temperature. It is not forgiving on time.
Boiling water works fine here because these leaves have already been fully oxidised during processing, which makes them sturdier than green or white leaves. Pour it on straight off the boil. Where people go wrong is walking away and forgetting the timer. Leave it going for eight or ten minutes, and the tannins that give it body start tipping into the bitterness that gives it a bad name.
Three to five minutes is the window. Shorter for a lighter, brighter cup. Longer if you take milk, since a stronger cup stands up to it better and won't taste watered down once the milk goes in.
How to Make Tea That Doesn't Turn Bitter
The fix is almost always quantity and timing together, not one or the other. One level teaspoon of tea per cup, or one bag, is the right starting point. Add more if you like it strong. Just move the timing up slightly if you do, rather than leaving a light dose in the water for twice as long hoping for the same result.
Getting these basics right matters, because it's the one most Irish households drink daily. Where it gets more interesting is the tea most people get wrong without realising it.
Why Boiling Water Ruins Green Tea
This is the tea that punishes boiling water hardest. Green tea leaves are unoxidised, which means they're more delicate and considerably more sensitive to heat than more processed leaves. Pour boiling water straight over the leaf, and you scald it, pulling out excess tannins and pushing the flavour toward bitter and grassy instead of the sweet, vegetal note it should have.
Let the water sit for a minute after boiling, or use a temperature-controlled option if you make this often enough to justify it. Aim for 75 to 80°C. Two to three minutes is usually enough. If it tastes bitter and you've been timing it correctly, the water temperature is almost always the culprit.
Matcha follows a different set of rules entirely, since you're whisking powdered leaf into the water rather than infusing and removing it, but the same temperature sensitivity applies. Water that's too hot flattens matcha the same way it does delicate green leaves. If you're deciding between the two, our matcha versus green tea breakdown
White tea deserves more credit than it gets.
White tea has a reputation for being delicate and fussy. In practice, it's one of the more forgiving teas to make, provided you don't scald it the way boiling water scalds more delicate leaves.
White teas need slightly more leaf than black or green, since the leaves are light and fluffy and need a higher quantity to extract properly. Water at 75 to 80°C for three to four minutes gives you a pale, faintly sweet cup with almost none of the bitterness people associate with an over-strong one.
Steep Your Tea, Then Walk Away
This is one of the few categories where sitting a little long barely punishes you. It also handles a second round well, often giving you a nearly identical cup from the same leaves rather than a weak, watery repeat.
What Makes Oolong Worth the Extra Effort
Oolong sits between green and black in oxidation, and that middle ground gives it the widest flavour range of any tea category. Lighter oolong teas behave closer to green in style and want a slightly lower temperature. Darker, more roasted ones can handle water closer to boiling.
As a starting point, 85 to 95°C for three to four minutes covers most of what you'll find on a shelf. What makes it worth the extra attention is that good leaves can be re-infused three or four times, with each infusion revealing a slightly different note. It's the tea equivalent of getting more value per gram than anything else in the cupboard.
Pu-erh tea, often sold as compressed tea in discs or bricks, works on a similar principle of repeated infusion, though it's a different category with its own fermentation process. If this appeals to you, pu-erh is the logical next tea to explore, along with gong fu style preparation generally, which is built entirely around short, repeated infusions rather than one long wait.
Herbal Teas and Rooibos Are the Forgiving Ones
Herbal teas and rooibos are the exception to nearly every rule above, and the good news is that exception is simple. There's no oxidation to protect and no delicate leaf structure to scald, so boiling water is exactly right. Steep for longer than you would any true tea, five to seven minutes, to properly draw the flavour out of dried fruit, flowers or rooibos leaf.
This is also the category with the least room for expert tricks to matter. A good rooibos or fruit infusion is more about the quality of what's in the blend than the precision of how it's made.
Teaware That Improves Your Brew
You don't need a full tea ceremony setup to make a good cup, but a handful of pieces of teaware make a genuine difference rather than just looking good on a shelf.
Teapot, Infuser and Tea Leaves
An infuser is the single most useful purchase if you're moving from tea bags to loose leaf. A basket infuser that sits inside a mug or pot gives the leaf room to expand, which matters more than the material it's made from. A simple mesh strainer does the same job if you'd rather work directly in the pot and strain on the way into the cup, which is closer to how tea is traditionally made in China and works particularly well for gong fu-style preparation.
A teapot matters less than people assume for flavour and more for ritual. That said, a Japanese kyūsu, a small side-handled pot traditionally used for delicate leaves, is worth having if you drink a lot of Japanese green tea, since its built-in filter is designed specifically for the fine leaves those cups use.
An electric option with temperature control removes the guesswork from green and white tea entirely. It's not essential. A thermometer and a bit of close attention do the same job for less money; it just asks more of you.
Iced Tea and Cold Brew, Done Properly
Made badly, it's cloudy, weak and diluted by melting ice cubes. Made well, it starts with a stronger hot brew than you'd normally make, since what you add afterwards is going to dilute it regardless.
When to Brew Tea Stronger or Weaker
The straightforward method is to make it double strength, roughly double the tea leaves for the same amount of water, then pour over ice immediately so it cools fast without stewing. Cold brewing takes a different route entirely. Instead of hot water and a short dip, you use cold water and a long one, several hours in the fridge, sometimes overnight. The result is a naturally sweeter, less tannic cup, since the compounds responsible for bitterness extract far more slowly in cold water than hot.
This method works particularly well for green and white teas, where you're trying to avoid bitterness in the first place, and for anyone who finds a hot-steeped iced tea tastes bitter once it's cooled. If you've had good cold coffee made the same way and never tried the tea version, it's a genuinely different drink from the same leaf.
Why Irish Water Changes the Result You Get
Here's the part nearly every brewing guide skips, and it's the reason two people can follow the same steps and end up with noticeably different cups.
Water hardness affects how tea extracts. Softer water, lower in dissolved minerals, draws out flavour and aroma more efficiently and tends to produce a brighter, more transparent cup. Harder water, higher in calcium and magnesium, can mute some of the more delicate notes in green and white tea and occasionally leaves a faint film on the surface of a strong cup, which is mineral content reacting with the tannins, not a sign anything has gone wrong.
Ireland's water varies more than people expect from region to region, largely depending on whether the local supply comes from limestone areas or softer upland sources. If your tea has ever tasted flatter or less aromatic than it should, despite doing everything else right, water is worth checking before you blame the leaves.
The fix doesn't need to be complicated. A basic filter jug softens most of the harshest mineral content and is enough to notice a difference in green and white tea especially, where subtlety is the whole point. For stronger infusions and herbal blends, it matters less, since the boldness covers for it.
The Mistakes That Ruin an Otherwise Good Cup
Tea Brewing Without Guesswork
Most disappointing cups of tea trace back to one of the same handful of habits.
- Reboiling water repeatedly, which drives off dissolved oxygen and leaves tea tasting flat, even at the right temperature and time.
- Using a teabag for a tea that deserves better, particularly with green, white and more delicate leaves, where the tightly packed leaf inside a bag can't fully unfurl and release flavour.
- Guessing quantities instead of measuring, which is the single biggest cause of inconsistent tea from one cup to the next in the same household.
- Letting steep time slide because the timer feels like a suggestion rather than a rule, especially with black and green, where the gap between right and bitter is often under two minutes.
- Storing tea somewhere warm, bright or humid, which flattens flavour over weeks even before the water ever touches the leaf.
Fix the storage and the timing, and most of the rest takes care of itself.
Keep a Tea Journal
This sounds like more effort than it is. A tea journal doesn't need to be formal; a few lines in a notes app after a cup that stood out or fell flat is enough. Note the tea, the water temperature, how long you left it and what you'd change. After a few weeks you'll have a personal reference more accurate than any table, including the one at the top of this guide, because it's tuned to your water, your kettle and your taste rather than an average.
Getting the Cup Right, Consistently
None of this requires special equipment or years of practice. It requires knowing which tea you're holding, matching the water to it, and respecting the clock more than most people do out of habit.
The same principle carries over if coffee is more your morning routine than tea. Good coffee preparation runs on the same logic of temperature, ratio and time, and cold coffee brewed this way works for exactly the same reason cold tea does, patience extracting flavour that heat would otherwise rush.
If you're building a tea collection worth taking this seriously over, Kate's Kitchen's tea range is a reasonable place to start, with black, green, white and herbal options chosen with exactly this kind of care in mind rather than picked for the shelf.
The best cup of tea isn't the most expensive one. It's the one brewed at the right temperature, for the right time, in water that isn't working against you.
