Why You Rinse Green Tea Before Steeping It

There is a first infusion, and then there are all the other infusions, and people complain about the first one more than any other. Thin. Grassy. A little bitter at the edges. Sometimes sour.

That first cup is usually fine, and the problem is usually that the leaf was never allowed to open.

A rinse fixes it in thirty seconds, and it is the single biggest difference between a mediocre green tea and a good one — bigger than water temperature, bigger than leaf weight, bigger than anything else you can adjust afterwards.

What a rinse actually is

Pour hot water over the dry leaf, wait about thirty seconds, and pour the water off. Discard it. Then brew the tea properly.

That is the whole procedure. It looks like waste, because it is. You are throwing away a small amount of liquid that has pulled a little flavor out of the leaf, and in exchange you get a leaf that behaves for the rest of the steeps.

In Chinese and Japanese tea practice this is sometimes called waking the leaves, and the reason for it is that dry leaf is not a leaf yet. It is folded, rolled, or pressed into a shape the processing made so it would keep. What it needs is hot water and thirty seconds to undo that shape.

Why a dry leaf needs it

The leaf has to open before it can give anything up. A dry rolled green tea leaf is tight and dense. Water has to get into it before it can dissolve out of it. Thirty seconds of wetting is enough to swell the leaf, relax the roll, and let the leaf expand to two or three times its dry size.

Then the real steeping happens on an open leaf, where the water can reach the surface evenly.

There is still air in the leaf. Tea leaves keep releasing a small amount of carbon dioxide after drying and after packing — it comes from the photosynthesis the leaf did before it was picked. That trapped gas pushes back against the first water you pour in. It slows extraction and it dulls the aroma. A rinse flushes that gas out, and the cup after the rinse tastes noticeably cleaner.

The leaf and the water are at different temperatures. A dry leaf sitting in a cold mug is at room temperature, around 70°F. When you pour 175°F water over it, the leaf has to absorb the heat before it can start extracting, and part of the steep is spent warming the leaf instead of pulling flavor out of it. After a rinse, the leaf is already hot and hydrated, and the real steep starts doing work immediately.

Some leaves carry dust. Handled and packed tea picks up fine dust, and in a bagged or dusty tea it can taste faintly of storage. A rinse takes it out.

What it does to the cup

A rinsed green tea does not taste like less tea. It tastes like more tea, and here is why that sounds backwards.

The astringency and the grassy note in a green tea come from compounds concentrated near the surface of the leaf, and a tight dry leaf releases them unevenly. Some bits give up fast and some bits give up nothing, and the result is a cup that is thin and sharp in patches.

When the leaf is open and hydrated, extraction is even. You get the sweetness and the aromatics instead of the edge, and the astringency that is characteristic of green tea arrives later and stays longer instead of showing up in the first thirty seconds.

That is why people describe a good green tea as having a long, sweet finish, and a badly brewed one as tasting sharp and then nothing.

The numbers

Here is a rinse you can repeat without thinking about it.

Leaf: 3 g for one cup, or 4 g for a small pot. We go into how to weigh tea in why tea measured in spoons does not work.

Rinse water: 175°F for a green, 195°F to 200°F for an oolong or a white. Just off boiling for anything delicate.

Amount: enough to cover the leaf. About 60 ml is right for a gaiwan or a small pot.

Time: 30 seconds. Twenty if the leaf is a tightly rolled sencha, forty if it is a large whole-leaf white.

Then throw it away. All of it.

Then brew for real. A second infusion of the same leaf, same temperature, 60 ml for sencha, 30 seconds. For a larger pot, 175°F for 2 minutes.

If you are brewing gongfu style with several short infusions, the rinse is not optional — it is step one of the sequence. We have a full walkthrough in how to brew gongfu tea.

Which teas it applies to, and which it does not

Rinse: green tea. Especially pan-fired Japanese greens like sencha and gyokuro, which are rolled tight and are the most common source of the complaint. Our guide to brewing a proper sencha assumes the rinse.

Rinse: white tea. Large whole leaves that need to open. Brewing white tea properly covers the rest.

Rinse: oolong. Particularly the rolled ones. Brewing oolong properly has the details.

Rinse: jasmine green. It is a green tea underneath, and the jasmine aroma is delicate enough that a rushed first infusion can drown it. How to brew jasmine green tea is the walkthrough.

Do not rinse: matcha. You would be pouring away a meaningful amount of powder, and matcha is not steeped — it is whisked. The whole point is that the leaf is already fully dispersed.

Do not rinse: black tea. Fully oxidized leaves do not have the same astringency rush, and they open fast in hot water. Rinsing black tea is a waste of a good cup.

Do not rinse: most herbal infusions. Except with heavy dust, or with a blend that includes whole spices like cinnamon bark, where a quick rinse clears the dust. Otherwise, steep them.

Your call: roasted green teas. Hojicha and genmaicha are toasted, which changes the leaf structure. Many people skip the rinse on these. It does no harm to include one, but the grassy complaint does not apply, so it is optional. Brewing hojicha properly is here if you want the full method.

The objection, which is fair

The objection is that you are throwing away flavor, and it sounds wasteful.

You are throwing away a little. The rinse pulls maybe the first five to ten percent of what is in the leaf, and what you get back is a cup with more of the leaf's actual character in it. The math is not close.

But the deeper version of the objection is worth taking seriously: not every tea wants a rinse, and a ritual applied by default stops being a decision. If you rinse every tea you drink, you have replaced judgment with habit. The list above is the judgment. It is short enough to remember.

There is a related argument in why we do not gatekeep our brew recipes — the numbers are there so you can change them, and a method you never question is a method you have stopped thinking about.

Try it as a side-by-side

This is the test, and it takes one brewing session.

Brew two cups of the same green tea, same leaf, same water, same temperature, same time. Rinse the first one. Do not rinse the second.

Taste them side by side while both are warm.

The unrinsed cup will usually be thinner, a little more astringent up front, and shorter in the finish. The rinsed cup will usually be sweeter, more complete, and longer.

If your two cups taste the same to you, then your tea does not need rinsing — and now you know that about your tea specifically, which is more useful than a rule you follow on faith.

P.S. If the astringency in your cup is a problem even after a rinse, the other two suspects are water temperature and steep time, and the chart of water temperature by tea type plus why oversteeped tea tastes harsh cover both.

Sip slow.

— Seraphina