The Best Coffee for Cold Brew (and the Roast Most People Get Wrong)
What roast is best for cold brew?
Medium to dark. Cold water pulls out far less acidity than hot water, and acidity is most of what makes a light roast interesting. Darker roasts bring chocolate and body, which survive the process.
This is the opposite of the usual advice for pour over, and it catches people out.
If you want a bag built for this, 15W40 is our dark Italian roast and it is the one most people reach for here.
A light roast in cold brew tends to taste like weak tea. Nothing is wrong with the beans, they are just being asked to do something they are not built for.
The method is only half of it. The bean decides the rest.
You can dial in every variable on a cold brew batch and still get a cup you do not want, because the bag was never going to work.
Roast level does more here than any other single choice.
See the roasts →What grind and ratio should you use?
Coarse grind, like raw sugar. For concentrate use one part coffee to eight parts water by weight. For ready-to-drink, one to twelve.
A fine grind will over-extract even in cold water and turn muddy, and it makes filtering miserable.
Weigh it if you can. Cold brew is the one method where a small ratio error compounds over eighteen hours instead of thirty seconds.
| Style | Ratio (coffee:water) | Steep time | Result |
|---|---|---|---|
| Concentrate | 1:8 | 16 to 18 hrs | Dilute 1:1 to serve |
| Ready to drink | 1:12 | 12 to 14 hrs | Pour straight over ice |
| Strong concentrate | 1:6 | 18 to 24 hrs | For milk drinks |
| Fridge slow steep | 1:8 | 24 hrs | Smoother, less bitter |
Most people change technique when they should change coffee.
It is easier to blame the equipment than the bag on the counter. Usually it is the bag.
Start with a roast built for how you brew and most of the fiddling disappears.
Browse the lineup →How long does cold brew actually keep?
Concentrate holds up in the fridge for about two weeks in a sealed container. Diluted cold brew is best inside three to five days before it starts tasting flat.
Keep it sealed. Cold brew picks up fridge smells faster than anything else in there.
If it tastes sour rather than flat, that is not age, that is over-extraction from too fine a grind.
The morning you want is boring and repeatable.
The method works. The grind works. The only variable left is whether there is coffee in the house on a Tuesday.
- Pick the roast that suits how you actually brew.
- Set it to resupply on a schedule that matches what you drink.
- Stop thinking about it. You do not hit zero again.
Questions people actually ask
Can you use pre-ground coffee for cold brew?
You can, but most pre-ground is a medium drip grind which is finer than ideal. It will work and will be slightly muddier. If you are buying specifically for cold brew, ask for a coarse grind.
Is cold brew stronger than regular coffee?
Concentrate is, substantially, but that is because it is undiluted. Once you cut it with water or milk, a serving lands close to strong drip coffee. The caffeine depends entirely on the ratio.
Should cold brew steep in the fridge or on the counter?
Either works. Room temperature extracts faster and needs about twelve to fourteen hours. The fridge takes closer to twenty-four but produces a slightly smoother result with less risk of over-extraction.
Why is my cold brew bitter?
Usually a grind that is too fine or a steep that ran too long. Cold brew is forgiving but not unlimited. Go coarser first, then shorten the steep by a few hours.
Do you need a special cold brew maker?
No. A jar and a fine mesh strainer lined with a paper filter does the same job. Dedicated makers are more convenient to filter, but they do not change the coffee.
Brew it. Get after it.
Whatever you are up against tomorrow, it starts better with a cup that was worth making.
Subscriptions take 30% off the first order automatically. No code, nothing to remember. One time orders take 15% with WELCOME15.
Shop the roasts →If this is what you drink every morning, buying it one bag at a time is the expensive way to do it. A subscription runs about sixty six cents a mug and the first order is 30% off, applied automatically with no code to enter.
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