Cold Brew Coffee: Ratio, Steep Time, and the 4-Step Method

Cold brew coffee is not iced coffee. Iced coffee is hot-brewed coffee poured over ice. Cold brew steeps ground coffee in cold water for 12 to 18 hours. No heat at any point. The result is smooth, low-acid, and heavy-bodied. It is the easiest hands-off brew method. The concentrate keeps in the fridge for up to 2 weeks.

Cold Brew Coffee Parameters

The Cold Brew Coffee Method

Step 1: Grind coarse. Coarser than French press , large, chunky, irregular grounds. Fine grind produces bitter, over-extracted cold brew. Step 2: Combine. Add grounds and cold water to a large jar or pitcher. Stir to make sure all grounds are saturated. Step 3: Steep in the fridge. Cover and refrigerate for 12 to 18 hours. Do not steep at room temperature , the fridge controls fermentation and keeps the coffee clean-tasting. Step 4: Strain. Pour through a fine mesh strainer lined with a paper filter or a clean cloth into a new jar. Press the grounds gently , do not squeeze. Discard the grounds. The strained cold brew coffee keeps refrigerated for up to 2 weeks. See our home barista guide for a burr grinder recommendation that handles coarse grind well.

Dark roast coffee is purpose-built for cold brew. The cold steep relies on time and surface area, not heat. Dark roast's low acidity, heavy body, and oil-forward profile all survive the long cold extraction intact. Light roast in cold brew turns thin and acidic. Cold temperature amplifies rather than softens acidity. Dark roast suppresses it. Browse our premium whole bean coffee , Brewtal Awakening dark roast is the recommended cold brew coffee base. See our dark roast guide for how dark roast body and acidity compare to other roast levels.

Full-strength cold brew (1:8 ratio) can be served straight over ice. Concentrate (1:5 ratio) needs dilution , typically 1:1 with water, milk, or oat milk before serving over ice. Black cold brew over ice: no dilution needed at 1:8. Cold brew with milk: 1:5 concentrate plus equal part whole milk over ice. Cold brew tonic: 1:5 concentrate plus sparkling water, ratio to taste. At 1:8 full strength, no ice is needed , it is already fridge-cold. Subscribe with the Blackout Coffee Club for Brewtal Awakening on rotation. See our coffee storage guide for keeping whole beans fresh before grinding for cold brew.

The Right Beans for Cold Brew

Browse our premium whole bean coffee , Brewtal Awakening dark roast is the best cold brew base. Ships within 1 to 2 business days of roasting.

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Frequently Asked Questions

12 to 18 hours in the fridge. Under 12 hours produces under-extracted cold brew , thin and weak. Over 24 hours produces over-extracted cold brew , bitter and harsh. The sweet spot for most dark roast cold brew coffee is 14 to 16 hours. Coarser grind allows a longer steep. Finer grind requires a shorter steep. Start at 14 hours and adjust one variable at a time.

Technically yes, but the fridge is better. Room temperature cold brew steeps faster , 8 to 12 hours , but can develop off-flavors through mild fermentation. Fridge steeping takes longer but produces a cleaner, more stable cup. If you steep at room temperature, shorten the steep to 8 to 10 hours and strain immediately. See our coffee storage guide for how to keep cold brew fresh after straining.

1:8 for a full-strength, drink-straight cold brew. 1:5 for a concentrate you dilute before serving. The 1:5 concentrate is more efficient , it takes up less fridge space and keeps longer. Dilute 1:1 with water for a standard cup, or 1:1 with milk for a cold brew latte. For a lighter cold brew coffee, extend to 1:10. Always measure by weight for consistency. A kitchen scale removes all guesswork. See our home barista guide for why weighing by gram is the most important brew habit.

Cold brew concentrate does , more coffee per ml than drip. A 1:5 concentrate has roughly 2 to 3 times the caffeine of standard drip coffee per ounce. Diluted to 1:1 before serving, the caffeine per serving is comparable to a strong drip cup. Full-strength 1:8 cold brew coffee is similar to standard drip. The longer steep extracts more caffeine than a 4 to 6 minute hot brew , more contact time. Browse our premium whole bean coffee for the full lineup.

Heat accelerates extraction of chlorogenic acids, which are the primary source of acidity in hot-brewed coffee. Cold water extracts these acids more slowly and less completely. The result is a cup with up to 67% less acidity than hot-brewed coffee using the same beans. This is why cold brew coffee is the preferred choice for acid-sensitive drinkers. Dark roast starts with lower acidity before cold extraction reduces it even further. Subscribe with the Blackout Coffee Club for Brewtal Awakening on rotation.

Fresh-Roasted Dark Roast for Cold Brew

Browse our premium whole bean coffee , dark, medium, and light roast , ships within 1 to 2 business days of roasting.

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