Cold brew is the tortoise of coffee methods: no heat, no pressure, just time — twelve hours or more of room-temperature or refrigerated steeping that extracts a fundamentally different cup than any hot method. Low acidity, heavy sweetness, zero bitterness edge, and a shelf-stable concentrate that made it the beverage industry's favorite coffee format. It's also nearly impossible to do badly, provided you respect three numbers.
The Standard Method
Grind coarse — coarser than French press. Combine at 1:8 for concentrate (125 g coffee to 1 liter of water) or 1:15 for ready-to-drink. Steep 12–18 hours: room temperature is faster, refrigerated is cleaner; both work. Strain through a fine sieve lined with paper or cloth, and you have coffee that holds in the fridge for two weeks — concentrate dilutes 1:1 with water, milk, or ice.
Why it tastes different: heat is what extracts most of coffee's acids and bitter compounds. Remove heat and the balance shifts decisively toward sugars and body — chocolate, caramel, dried fruit, with the sharpness sanded off. What's lost is the aromatic sparkle of hot brewing: florals and bright acids simply don't extract cold.
Choosing Coffee for Cold Brew
That extraction profile rewrites the buying logic: delicate floral lots waste their premium in cold brew, while chocolate-forward, full-bodied coffees taste like they were designed for it. Medium roasts of Brazilian naturals, Sumatran wet-hulled — and, emphatically, Bolaven Plateau coffee. Our washed Arabica's caramel-and-chocolate center lands squarely in cold brew's sweet spot, and our Fine Robusta is the format's secret weapon: its density and low-acid depth produce concentrate with espresso-like presence over ice, at a component cost that makes beverage-program margins smile.
Scaling Up: Notes for Cafés and Bottlers
Commercial cold brew is mostly logistics: food-safe steeping vessels, consistent coarse grinding, and — the step home brewers skip — rapid chilling and cold-chain holding, since cold brew's low acidity makes it more microbiologically delicate than its shelf presence suggests. Nitro service and RTD bottling both start from the same 1:8 concentrate.
For volume programs, green cost dominates the recipe economics, which is exactly where a clean Fine Robusta or a washed Arabica from an unfamous origin outperforms famous-name beans that cold water will anonymize anyway. We supply several cold-brew programs across Asia; ask for our concentrate-tested lot recommendations and cupping samples.