How to Make Cold Brew at Home

Cold brew is the most forgiving method in coffee: coarse grounds, cold water, 12-18 hours in the fridge, strain. No temperature to hit, no pour technique, no machine — time replaces heat as the extraction engine, which is also why the result tastes so smooth: cold water leaves behind most of the sharp, bitter compounds hot brewing pulls out. If you can make iced tea, you can make excellent cold brew.

The recipe

For concentrate, use a 1:5 ratio — say 150g of coarse-ground coffee to 750g of cold water (the ratio guide covers the math family). Stir so every ground is wet, cover, and refrigerate 12-18 hours. Strain, and you have concentrate that keeps up to two weeks: dilute roughly 1:1 with water or milk over ice per glass. Prefer ready-to-drink? Steep at 1:8 instead and skip the dilution.

Two zero-purchase methods

French press: the best cold-brew maker most people already own — steep in the press, plunge gently, decant (our press picks all work). The plunge is your strainer. Mason jar: steep in any jar, then strain through a fine sieve lined with a paper filter. Slower to strain, zero dollars. Purpose-built cold-brew pitchers are a convenience, not a requirement — buy one only after the habit sticks.

The mistakes that ruin it

Grinding fine: the classic error — fine grounds over-extract even in cold water and turn the strain into mud. Grind coarser than French press; blade-grinder dustis cold brew's worst enemy. Steeping on the counter: room-temperature steeps ferment funky past ~12 hours; the fridge is slower but clean. Over-steeping:past ~24 hours it goes woody and dull — longer is not stronger, it's just older. Stale beans: cold brew hides acidity, not staleness; medium-dark, chocolatey beans shine here (see best beans for cold brew).

One honest caveat: cold brew is a different drink from iced coffee — smoother, rounder, and usually more caffeinated per glass (the caffeine table). If you love bright, acidic iced coffee, brew hot over ice instead; cold brew's smoothness is exactly what it can't do.