Cold brew coffee makers steep coarse grounds in cold water for 12–24 hours, then drain the concentrate for up to two weeks of fridge-stable coffee.
Making cold brew at home is a simple steep-and-drain process, but the details decide whether you get a smooth, rich concentrate or a bitter, muddy mess. Most makers follow the same basic formula, and the differences come down to your specific model’s parts and timing. Whether you use cold brew to save money over cafe prices or for the smoother, lower-acid result, the method matters more than the machine.
The standard ratio that works across most home brewers is roughly 1 part coffee to 4 parts water by weight. That produces a concentrate you dilute before drinking, rather than a ready-to-serve cup.
The Basic Cold Brew Method That Works In Any Maker
Every countertop cold brew maker follows the same four-stage cycle: add coffee, add water, steep, then drain. Here is the sequence that works regardless of whether your brewer is a pitcher-style system or a glass carafe with a separate brewing chamber.
- Add coarsely ground coffee to the brew basket or chamber. Coarse grounds resemble breadcrumbs, not table salt.
- Pour cold or room-temperature water slowly over the grounds, pausing to let the water absorb.
- Stir gently to make sure every ground is saturated. Dry pockets produce weak spots in the brew.
- Steep for 12–24 hours in the refrigerator or at room temperature, depending on your model’s instructions.
- Drain or remove the filter, then store the finished concentrate in a sealed container.
The steeping window matters more than most people think. Shorter steeps yield a lighter, tea-like concentrate; longer steeps push out more caffeine and body. Find the time that suits your taste within the 12–24 hour range.
OXO Cold Brew Coffee Maker: Step-By-Step Numbers
The OXO Cold Brew Coffee Maker uses a two-chamber design where the coffee steeps above the carafe and drains when you flip a switch. OXO’s official instructions call for 10 oz/284 g of coarsely ground coffee and 40 oz/1200 ml of water, steeped 12–24 hours, followed by about 20 minutes to drain. The concentrate keeps in the refrigerator for up to two weeks.
Setup requires attention to the parts order. Flip the brewing container upside down, set the mesh filter flat in the base, screw on the filter cap, and place the assembly on its stand. Keep the brew-release switch up in the off position while you brew.
- Add the coffee grounds to the brewing container.
- Pour water in a circular motion over the grounds, then stir to saturate them evenly.
- Wait 5 minutes, then stir again to break up dry clumps.
- Steep for 12–24 hours at room temperature.
- Set the carafe under the stand, then press the brew-release switch down to drain.
Draining time varies with grind size, so check the flow periodically. The mesh filter catches fines, but an overly fine grind will slow drainage dramatically.
When you’re ready to serve, OXO recommends 2 oz/60 ml of concentrate with 4–6 oz/120–180 ml of cold water or milk over ice. For hot coffee, use the same concentrate amount with hot water or milk instead.
Pitcher-Style Makers: Takeya and KitchenAid
Pitcher-style cold brew makers simplify the process by steeping the grounds inside a removable filter that sits in the pitcher. Takeya’s instructions are straightforward: add coarse grounds to the filter, fill with cold filtered water, seal the lid airtight, shake for 30 seconds to moisten the grounds, then refrigerate for 12–24 hours with the occasional shake. Remove the filter when the brew is ready, and the finished cold brew stores up to two weeks.
The airtight seal is the detail Takeya emphasizes because oxygen exposure degrades flavor during the long steep. If the lid isn’t sealed completely, the brew can pick up off-flavors from the refrigerator. Shaking the pitcher occasionally also redistributes the grounds for more even extraction.
KitchenAid’s cold brew models follow the same logic, with one distinction: the manufacturer’s guidance allows brewing either in the refrigerator or at room temperature. One KitchenAid manual specifies 34 oz/1 L of cold water for its brewing chamber. The practical lesson is to check your specific model’s capacity markings rather than assuming every pitcher holds the same volume.
If you’re still choosing between brewer styles, our tested roundup of the best coffee maker for cold brew compares the leading options side by side.
Mistakes That Ruin Cold Brew
Most failed batches trace back to four errors, according to the official instructions. Overfilling the brew basket blocks water flow and leaves dry grounds in the middle. Using fine grounds creates sludge and slow drainage. Failing to seal a pitcher lid airtight lets the brew oxidize. And rushing the steep or drain produces weak or watery coffee.
One other detail matters: freshly ground coffee can “bloom” after water is added, releasing gas and expanding. OXO notes this in its instructions, which is why a second stir after a few minutes helps. If you add all the water at once without stirring, the gas can push grounds above the water line.
Glass carafes also need a gentle touch. The OXO carafe is meant for serving and storage, so handle it by the base when full and let it warm slightly before washing after refrigeration.
References & Sources
- OXO. “OXO Cold Brew Coffee Maker Instructions.” Official dosing, steeping, and draining steps for the 28 oz model.
- OXO. “Compact Cold Brew Instruction Booklet.” Covers the compact model’s brewing process and serving ratios.