How To Brew Cold Brew Coffee | Fridge-Steeped And Ready In 14 Hours

Cold brew’s appeal is the smooth, low-acid cup it produces without any heat. The working method here follows the cold-brew white paper from the National Coffee Association: medium-coarse grounds, a 1:8 coffee-to-water ratio by weight, a fridge steep of about 14 hours, and dilution to taste afterward. Whether you brew a single liter or a gallon, the same proportions hold, and the payoff is concentrate you can stretch across a week of iced coffees.

The 1:8 Ratio And Why Weight Beats Scoops

Start with a 1:8 ratio of coffee to water measured by weight, not volume. Coffee density varies wildly with roast and grind, so scoops drift; grams do not. A liter batch works out to roughly 125 grams of coffee to 1,000 grams of water.

Grind medium-coarse, about the texture of raw sugar or coarse sea salt. A too-fine grind over-extracts and turns cold brew muddy and bitter, so resist the urge to use your espresso setting.

Weighing also makes scaling repeatable. Double the batch, double both numbers, and the steep time stays the same. If you are shopping for gear, the best coffee makers for cold brew roundup on this site covers brewers that handle the filtration for you.

Steep 14 Hours In The Fridge, Then Filter

Combine the grounds and water in a large jar or French press, stir once to saturate, cover, and refrigerate. Fourteen hours at fridge temperature is the sweet spot; anything shorter tastes weak, and much longer can turn vegetal. The fridge matters — the NCA’s guidance and local health-department rules both treat cold brew as a temperature-sensitive product that should be brewed cold and kept cold.

Filter with a fine-mesh strainer lined with a coffee filter, or press slowly if using a French press. Expect some sediment no matter what; that is normal for home cold brew. The result is a concentrate, not a ready-to-drink cup.

Dilute to taste, since most people prefer a 2:1 to 1:1 ratio of concentrate to water. Start at 1:1 and adjust: more water for a lighter cup, less for a bold one. Serve over ice with milk or sweetener as you like.

How Long Does Cold Brew Last In The Fridge?

Properly refrigerated cold brew concentrate keeps for about a week. Maricopa County’s retail food guidance treats cold brew as a time/temperature control for safety food and requires date marking it for no more than 7 days from production, and British Columbia’s public-health guidance on nitro cold brew sets a 10-day maximum refrigerated shelf life. For home use, plan on finishing a batch within that first week and you are safely inside every guideline.

Keep the concentrate sealed and refrigerated the whole time. Unrefrigerated storage is the one real safety hazard; Cold brew is not shelf-stable at room temperature, no matter how it was packaged.