I’ll never forget the time I went back to Taiwan and all of my tea friends were crazy for cold brew.

This was not what I expected. Taiwan has one of the deepest hot tea cultures in the world — gong fu brewing, clay teapots, multiple short steeps, paying close attention to every detail of temperature and timing. These were people who took tea seriously. And here they were, dropping leaves into cold water and sticking them in the fridge overnight like it was the most natural thing in the world.

I asked about it. The answer was simple: summer in Taiwan is brutal. Humid, relentless heat that makes sitting down to a hot gong fu session feel less like a ritual and more like a punishment. Cold brew wasn’t a compromise. It was an adaptation. And once I tried it, I understood immediately why it had caught on.

The flavor is different in a way that’s hard to describe until you experience it. Hot water extracts quickly and aggressively — it pulls everything out of the leaf at once, including some of the bitterness and astringency that give tea its edge. Cold water is slower and gentler. It takes 12 to 24 hours to do what hot water does in minutes, but what you get at the end is smoother, less acidic, and somehow more nuanced. Notes that get lost in a hot steep come forward in a cold one. A floral oolong becomes something almost delicate. A fruity tea opens up in ways you don’t expect.

I came back from that trip and started cold brewing at the teahouse. Customers who had never considered drinking tea in summer suddenly had a reason to. It became one of those quiet revelations — not a trend, just a better way to enjoy something you already loved, adapted to the season.

Cold Brew vs. Iced Tea: Not the Same Thing

Cold brew tea isn't the same as iced tea, and the distinction matters. Iced tea was already popular in Taiwan — especially among college students and office workers — and it's almost always made by brewing hot and pouring over ice. It works great, but the flavor is slightly different. There's something genuinely fun about experiencing that lighter, cleaner extraction side by side with what you're used to.

Cold brew flips the process entirely. Because you’re extracting with cold water over a long period — 12 to 24 hours — you get all of the caffeine, all of the beneficial compounds, and all of the flavor the leaf has to offer. What you don’t get is the astringency. Cold water simply doesn’t extract tannins the way hot water does. The result is a cleaner, smoother cup that lets the tea speak for itself.

How to Cold Brew Tea

The method couldn’t be simpler. One gram of tea per 100ml of cold water. A mason jar or a water bottle. Cold drinking water straight from the tap or filtered. Twelve to twenty-four hours in the fridge. Strain it through a mesh strainer — or a rinsed cloth filter if you want it crystal clear — and you’re done. It keeps in the fridge for up to three days, though in my experience it rarely lasts that long.

The ratio scales easily:

— Quart mason jar (1,000ml): 10 grams of tea

— 750ml water bottle: 7.5 grams of tea

No special equipment required. No kettle, no thermometer, no timer. Just tea, water, and patience.

8 Teas Worth Trying Cold This Summer

Not every tea cold brews equally well. The ones that shine tend to be lighter, more aromatic, and lower in tannins. Here are eight teas I’d recommend starting with:

Grapefruit Oolong — bright and citrusy cold, almost like a natural sparkling water without the bubbles.

Green Gold — the floral notes come forward beautifully in cold water.

Green Spring — clean and refreshing, one of the most straightforwardly satisfying cold brews we carry.

Ah Li Jade — a high mountain oolong that develops a silky texture cold that you don’t quite get hot.

Otter Rock Oolong — slightly more body than the others, holds up well over a full 24-hour steep.

Charcoal Seasons Oolong — the honey notes intensify cold in a way that makes this one feel almost indulgent.

Ba Gua Mountain — complex and layered, one of those teas that rewards a slow cold steep.

Fire Ape — aged white tea cold brewed is something special. Smooth, deep, and unlike anything else on this list.

If you’ve never cold brewed before, start with the Grapefruit Oolong or the Green Gold Oolong. They’re approachable, immediately delicious, and will make a convert out of you before the first glass is finished.

Put something in the fridge tonight. Summer is here.