Cold brew is the most forgiving coffee there is: coarse grounds, cold water, patience, done. No technique, no temperature, no timing anxiety — just chemistry slowly doing you a favor. Here's the concentrate method that makes a week of drinks in one jar.
Why cold extraction tastes different
Cold water extracts sugars and body readily but leaves behind many of the acids and bitter compounds that hot water grabs — the result is naturally sweet, chocolatey, low-acid coffee, typically ~65% less acidic than hot brew. That's also its limitation: the bright, fruity notes of fancy light roasts stay in the grounds. Medium and dark roasts are cold brew's happy place.
The concentrate recipe
1:5 ratio — 100g coarsely ground coffee (peppercorn-coarse) to 500g room-temperature water, in any large jar. Stir thoroughly so nothing stays dry. Lid on. Steep 14–18 hours — room temp for faster/rounder, fridge for slower/cleaner (fridge = ~18–20 hours). Longer isn't stronger, it's woodier; 24 hours is the practical ceiling.
Straining without regret
Pour through a fine sieve first (catches the bulk), then through a paper filter or cloth for a clean concentrate. Or brew directly in a French press and plunge — easiest cleanup in the game. Yield: ~400g of concentrate.
Dilution math and serving
Concentrate is 2–3× drinking strength: start at 1:1 with water or milk over ice and adjust. It keeps up to two weeks refrigerated (flavor peak: first week) — which is the entire point: Sunday's ten minutes = coffee until Friday. Instant iced latte: concentrate + cold milk + cold foam if you're feeling fancy; more ideas in our iced latte recipes.
Shortcuts and machines
No patience? The Breville Precision Brewer's cold brew mode compresses the process; the Eletta Explore and Jura Z10 do cold extraction in minutes with a different (lighter, flash-brewed) character. Purists keep a jar going anyway — the fridge-door ritual is half the pleasure.
