How to Make Cold Brew Coffee at Home

Homemade cold brew coffee is made by combining coarsely ground coffee with cold water, then letting it steep in the refrigerator for about 12 to 18 hours before filtering. The result is a smooth, refreshing, low-acid drink that is ready to dilute and serve over ice.

Slow extraction with cold water changes everything. Without heat, coffee releases more of its natural sweetness and rounded flavours while leaving behind much of the acidity and bitterness. According to the cold brew method documented by the National Coffee Association, low-temperature extraction produces a smoother and sweeter cup than hot coffee that has simply been chilled. The guide below explains every step, from choosing the beans to serving the finished drink.

What You Need to Get Started

The equipment is simple and can already be found in most kitchens. Gather the following before you begin:

• Freshly roasted specialty coffee, preferably whole bean
• A grinder set to a coarse grind, or coffee that has already been ground coarsely
• A large glass jar or pitcher with a lid
• Cold filtered water
• A fine-mesh sieve, cheesecloth, or coffee filter
• A kitchen scale for consistent measurements

A scale makes it easier to repeat the same recipe from one batch to the next. Fresh beans and an even grind will give you a strong starting point.

Step 1: Choose and Grind the Coffee

Start with a coffee you already enjoy. Chocolatey, nutty, or fruity profiles often produce a smooth and naturally sweet concentrate. Choose recently roasted beans whenever possible, since freshness directly affects the quality of the drink. You can explore different fresh specialty coffees to compare flavour profiles.

Set your grinder to a coarse setting similar to what you would use for a French press. Coffee that is ground too finely can pass through the filter and make the finished drink cloudy and bitter. Grinding immediately before brewing also helps preserve more aroma.

Step 2: Measure the Coffee and Water

The coffee-to-water ratio determines the strength of your cold brew. For a concentrate that will be diluted later, roasters often recommend a specific ratio and steeping time, usually around one part coffee to four or five parts water. For cold brew that is ready to drink without dilution, use approximately one part coffee to eight to fifteen parts water.

Weigh the coffee, place it in the jar, and add the cold filtered water. Stir gently until all the grounds are fully saturated. Every particle should make contact with the water, with no dry clumps floating on the surface.

Step 3: Let the Cold Brew Steep

Cover the jar and place it in the refrigerator. Let the coffee steep for approximately 12 to 18 hours, depending on the strength you prefer. A shorter steep produces a lighter cup, while a longer steep increases the body and sweetness.

Avoid steeping it for longer than 24 hours, since over-extraction can introduce woody and harsher flavours. A simple trick is to note the starting time so you can reproduce the same balance in future batches. There is no need to stir during the steeping period.

Ready to explore further? Try different origins and roast levels to find the profile you prefer, then adjust the steeping time accordingly. A coffee subscription box makes it easy to discover new beans regularly.

Step 4: Filter the Concentrate

Once the steeping time is complete, separate the liquid from the grounds. Slowly pour the contents of the jar through a fine-mesh sieve lined with cheesecloth or a coffee filter into a clean container.

Let the coffee drain at its own pace without pressing the grounds, which can release additional bitterness. Filtering it a second time will produce a clearer concentrate. The used grounds can then be discarded or added to your compost.

Step 5: Serve and Store

The finished concentrate is strong. Dilute it to taste with cold water, milk, or a plant-based beverage, often using equal parts concentrate and liquid, then serve it over ice. Adjust the ratio depending on whether you prefer a lighter or stronger drink.

Store the undiluted concentrate in an airtight container in the refrigerator and use it within a few days for the best flavour. Dilute only the amount you plan to drink so the remaining concentrate stays fresh for as long as possible.

Common Mistakes to Avoid

A few mistakes come up frequently when making cold brew for the first time. Avoiding them will improve the result immediately:

• Using coffee that is ground too finely, which can make the drink cloudy and bitter
• Using stale beans, which produce a flat concentrate with little aroma
• Pressing the grounds during filtration, which can extract additional bitterness
• Steeping for longer than 24 hours and losing the smooth flavour
• Diluting the entire batch in advance, which causes it to lose freshness more quickly

Do not confuse homemade cold brew with coffee that has been brewed hot and then chilled. The latter is traditional iced coffee. For a convenient option that is ready to take with you, Escape Café also offers a ready-to-drink option that is brewed, rapidly chilled, and canned.

Cold Brew Ratio Summary

Use this table as a starting point and adjust the ratios to match your preferences. The values are based on the roaster recommendations cited above.

Type of Drink	Approximate Coffee-to-Water Ratio	Refrigerated Steeping Time
Concentrate to dilute	Approximately 1:4 to 1:5	12 to 18 hours
Ready to drink	Approximately 1:8 to 1:15	12 to 18 hours

Conclusion

Making cold brew coffee at home requires very little equipment and only a bit of patience. With fresh beans, a coarse grind, the right coffee-to-water ratio, and a controlled steep in the refrigerator, you can make a smooth, low-acid drink that is easy to personalize. Start your first batch this evening, adjust the ratio and steeping time as you experiment, and keep a concentrate in the refrigerator for an easy refreshment whenever you need it.

FAQ

How do you make cold brew coffee at home?

To make cold brew coffee, coarsely grind freshly roasted specialty coffee and combine one part coffee with four to five parts cold filtered water. Cover the container and let it steep in the refrigerator for approximately 12 to 18 hours. Filter it through a fine-mesh sieve or coffee filter, dilute the concentrate to taste, and serve it over ice.

What is the difference between cold brew and iced coffee?

Cold brew and iced coffee are prepared differently. Iced coffee is brewed with hot water, then chilled and poured over ice, so it retains more acidity and brighter flavours. Cold brew is extracted with cold water over several hours without heat. The result is generally smoother, less acidic, naturally sweeter, and less bitter.

How long does cold brew coffee keep?

Once filtered, cold brew concentrate should be stored in an airtight container in the refrigerator. For the best freshness and flavour, use it within a few days and ideally within one week. After that, the flavours gradually become flatter. Keep the concentrate undiluted and add water, milk, or ice only when serving each glass.

What coffee should you use for cold brew?

Choose freshly roasted specialty coffee and grind it coarsely, as you would for a French press. Coffee that is ground too finely can pass through the filter and make the drink cloudy and bitter. Coffees with chocolate, nut, or ripe fruit notes often produce a smooth and sweet concentrate. A medium roast is a balanced place to start, but freshness and an even grind matter most.