How to Make Cold Brew Coffee at Home (2026 Guide + Recipe)

Cold brew has a reputation for being fancy café coffee, but it's the single most forgiving brew method there is. There's no pour technique, no temperature control, no timing a 3-minute extraction. You combine coarse coffee and cold water, wait, and strain. The result is smooth, naturally sweet, low-acid coffee that keeps in the fridge for two weeks — and costs about 40 cents a glass instead of $5.

Here's the exact recipe we use, plus the gear that makes it easier. If you're wondering how this differs from iced coffee — they're completely different drinks — our cold brew vs. iced coffee breakdown covers the taste, caffeine and cost differences.

The recipe (makes about 1 liter of concentrate)

What you need

100 g of coarsely ground coffee (think raw sugar or breadcrumbs — much coarser than French press), 1 liter of cold, good-tasting water, a large jar or pitcher, and something to strain with: a fine-mesh sieve plus a paper filter, a cheesecloth, or a French press plunger.

Steps

1. Add the coffee to your jar and pour the water over it slowly, making sure every ground gets wet. 2. Stir gently once, cover, and leave at room temperature for 16 hours (or 18–20 hours in the fridge). 3. Strain through your filter — expect this to take a few minutes; don't rush it. 4. Dilute the concentrate 1:1 with water or milk over ice, and store the rest in a sealed bottle in the fridge for up to two weeks.

That 1:10 ratio (100 g to 1 L) gives you a concentrate. If you'd rather brew it ready-to-drink, use 1:15 — about 65 g per liter — and skip the dilution. Our brew ratio calculator does the math for any batch size.

The easy way: a dedicated cold brew maker

You don't need special gear, but the straining step is where DIY cold brew gets annoying. The Toddy system has been the standard for 40 years for a reason: the grounds steep in a bucket with a reusable felt filter, and when time's up you pull one plug and the concentrate drains straight into a glass decanter. No sieves, no sludge, no cleanup wrestling. If you make cold brew more than once a month, it pays for itself in saved paper filters and patience.

Already own a French press? It doubles as a perfectly good cold brew maker: steep the coarse grounds overnight in the press, then plunge slowly and pour. The Bodum Chambord is our tested pick — one brewer, two drinks, zero extra gear.

The mistakes that ruin cold brew

Grinding too fine

Fine grounds over-extract over 16 hours and turn the brew bitter and muddy, and they clog every filter you own. Go coarser than you think — if your cold brew tastes harsh, grind size is almost always the culprit. A burr grinder makes this repeatable; our grinder roundup has picks from $40 up, and the Baratza Encore's coarsest settings are perfect for cold brew.

Using stale or stale-tasting water

Cold brew is 98% water and there's no heat to mask off-flavors. If your tap water tastes like chlorine, your cold brew will too. A filter pitcher fixes this for a few dollars a month — see our water quality guide for the mineral targets that make coffee taste sweeter.

Steeping too long

More hours does not mean stronger or better. Past about 20 hours at room temperature you extract woody, bitter compounds and the flavor flattens. 16 hours is the sweet spot; set a phone reminder.

Master this one recipe and you have café-quality iced coffee on tap all summer for pocket change. For the brighter, faster alternative, our iced coffee vs. cold brew guide shows the 3-minute Japanese iced method.

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