Cold Brew Coffee: Home Recipe and 12-Hour Steep Method

Cold brew coffee steeps coarse grounds in cold or room-temperature water for 12 to 24 hours. No heat involved. The slow cold extraction draws out sugars and oils while suppressing the acidic compounds that hot brewing releases. The result is a smooth, low-acid concentrate.

Cold brew coffee is also the most practical home coffee project. You need a jar, a strainer, and coarse-ground coffee. The concentrate keeps in the refrigerator for up to two weeks. This guide covers the ratio, steep time, the classic home recipe, and how to serve and dilute it.

Prep time: 10 minutes  |  Steep time: 12–24 hours  |  Yield: ~32 oz concentrate

Cold Brew Variables

Why Cold Brew Tastes Different

Heat accelerates extraction and activates specific acids in the coffee. Hot brewing releases quinic and chlorogenic acids that produce brightness but also bitterness and a sharp finish. Cold water extracts at a much lower rate, favoring sweeter flavor compounds and suppressing the acid release. The result is a cup that tastes naturally sweet and smooth without any sugar added.

The Specialty Coffee Association classifies cold brew separately from hot-brewed iced coffee. The extraction chemistry is fundamentally different. Iced coffee is hot-brewed coffee poured over ice. Cold brew never contacts heat.

Cold brew coffee also has a different caffeine profile. A 1:8 ratio concentrate has roughly double the caffeine concentration of regular drip coffee before dilution. Diluted 1:1 with water or milk, it matches or slightly exceeds drip coffee caffeine levels.

Classic Cold Brew Recipe

What you need: A 32-oz or larger glass jar. A fine mesh strainer or cheesecloth. A scale (recommended). Very coarse coffee grounds.

1. Grind 100g (about 1 cup) of coffee very coarse. The texture should be chunkier than French press grind , closer to coarsely cracked peppercorns.
2. Add the grounds to the jar and pour 800ml (about 3.5 cups) of cold or room-temperature water over them. Stir gently to make sure all grounds are saturated.
3. Cover the jar loosely and steep. In the refrigerator: 18 to 24 hours. At room temperature: 12 to 14 hours.
4. Strain the concentrate through a fine mesh strainer or cheesecloth into a clean jar. Press gently , do not squeeze or the concentrate turns cloudy and astringent.
5. Store the concentrate sealed in the refrigerator. Use within 2 weeks.
6. To serve: dilute 1:1 with cold water or milk over ice. Adjust to taste.

Choosing Roast Level and Serving

Medium and dark roasts produce the best cold brew coffee. The cold extraction process emphasizes chocolate, caramel, and roasted notes , which dark roasts have in abundance. Light roast cold brew is bright and complex but can taste thin when diluted. For smooth and bold cold brew, start with our Brewtal Awakening dark roast or Morning Reaper medium roast.

The 1:8 concentrate is too strong to drink straight. Standard dilution is 1 part concentrate to 1 part cold water or milk over ice. For a stronger cup, use a 2:1 or 3:1 concentrate-to-water ratio. It also works as a base for lattes, mochas, and iced drinks. Add sweetener directly to the concentrate before diluting for even mixing.

Cold brew is smooth, heavy-bodied, and very low acid. Iced pour over is bright, floral, and acidic. Both are cold but taste like different drinks. Cold brew suits drinkers who prefer smooth and strong. Iced pour over suits drinkers who want the clarity and origin character of hot coffee served cold. See our iced pour over guide for the flash-chill method. For grind calibration, see our coffee grind size guide and our coffee-to-water ratio guide.

Frequently Asked Questions

12 to 24 hours. Steep in the refrigerator for 18 to 24 hours, or at room temperature for 12 to 14 hours. Tasting at 12 hours helps you gauge strength. It is ready when it tastes concentrated but not bitter.

1:8 by weight , 100g of coffee per 800ml of water , produces a standard concentrate. Dilute 1:1 before serving. For a stronger concentrate to use in small quantities over milk, use 1:6. For a lighter cold brew ready to drink without dilution, use 1:12 and steep the full 24 hours.

Grind too fine or steep time too long. Cold brew coffee is forgiving of temperature but not of over-extraction from fine grind. Coarsen the grind first. If you use the correct coarse grind and still get bitterness, reduce steep time by 2 to 4 hours.

Up to 2 weeks refrigerated as undiluted concentrate. Once diluted, use within 3 to 5 days. The low-acid profile makes it more stable than hot-brewed alternatives. Store in a sealed glass jar for best results.

The concentrate does, yes. A 1:8 cold brew concentrate has roughly double the caffeine of regular drip coffee by volume. Diluted 1:1 before serving, it is roughly equal to or slightly stronger than a standard cup. The perception of extra strength comes partly from lower acidity making caffeine feel more pronounced.

Coffee Worth Steeping Overnight

Cold brew rewards bold, fresh coffee. Browse our premium coffee collection, our flavored coffee, or our five-pound bulk bags. Bulk bags are the most cost-effective option for cold brew batching.

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