Traditional iced coffee—hot coffee poured over ice cubes—becomes diluted and bitter in a matter of minutes. Cold brew solves this problem at the source: it is brewed cold from the start, never exposed to heat, resulting in a much smoother, naturally sweeter, and less acidic coffee. And the best part: you don’t need a coffee maker to make it.
Cold Brew vs. Iced Coffee: They Are Not the Same
Traditional iced coffee is made with regular hot coffee served over ice cubes: the result is diluted coffee that is often noticeably more bitter because high temperatures extract more bitter compounds from the coffee. Cold brew, on the other hand, is made by letting ground coffee steep in cold water for many hours. The slow cold extraction brings out the flavor and caffeine without extracting as much acidity or bitterness, producing a smooth concentrate that can be diluted to taste.
What You Need to Make Cold Brew at Home
No coffee maker, electricity, or machinery: cold brew can be made with what you probably already have in your kitchen, plus two items that make a difference:
- Coarsely ground coffee: a coarse grind (similar to coarse salt) prevents the result from being cloudy or containing grounds.
- Cold or room-temperature water (never hot: that would be regular brewed coffee, not cold brew).
- An airtight container for steeping in the refrigerator.
- A fine filter to separate the coffee grounds from the liquid once steeping is complete.
Airtight Container for Steeping
How it works here: The ground coffee needs to steep in the refrigerator for many hours in contact with the water; an airtight container prevents the coffee from picking up odors from the refrigerator and the liquid from spilling when moved.
Our recommendation: The Stackable Airtight Containers with Smart Unlocking seal completely airtight and are large enough to prepare several servings of concentrate at once.
Filter for Straining the Concentrate
How it works here: After steeping, the coffee grounds need to be separated from the liquid. A fine filter prevents grounds from getting into the final concentrate, which would otherwise be cloudy and have a gritty texture in the mouth.
Our recommendation: The Nesspure 3-in-1 Universal Coffee Maker Filter works for straining cold brew as well as for the other coffee-making methods you may already have at home.
Basic Cold Brew Concentrate Recipe
Ratio: 1 part coarsely ground coffee to 4 parts cold water (for example, 100 g of coffee to 400 ml of water for a strong concentrate).
- Place the coarsely ground coffee in the airtight container.
- Add the cold water and stir well to ensure all the coffee is moistened.
- Close the container and let it steep in the refrigerator for 12 to 18 hours (the longer it steeps, the more concentrated and intense it will be).
- After steeping, strain the liquid through the filter to separate the coffee grounds.
- Store the concentrate in the refrigerator in a closed container; it keeps well for 1–2 weeks.
How to serve it: The concentrate is too strong to drink on its own. Dilute it with cold water, milk, or a plant-based milk to taste—a common ratio is half concentrate and half liquid—and serve it over ice.
The Trick to Keep Cold Brew from Becoming Watered Down
Just like in our guide to homemade cold summer drinks, regular ice dilutes the flavor of the cold brew as it melts. The solution is to freeze the coffee concentrate itself into ice cubes: this way, as they melt, they reinforce the flavor instead of watering down the drink. This trick is especially useful with cold brew because the concentrate takes hours to prepare, and you don’t want it watered down in the first few minutes.
3 Variations to Keep Cold Brew Interesting
- Cold brew with milk or plant-based milk: replace some of the diluting water with whole milk, oat milk, or almond milk for a creamier result, similar to an iced latte.
- Cold brew with cinnamon: add a cinnamon stick to the container with the ground coffee while it steeps for a subtle spiced touch.
- Cold brew tonic: serve the concentrate with tonic water instead of water or milk, in equal parts, for a fizzy, less sweet drink.
Conclusion
You don’t need a coffee maker to enjoy a good cold coffee in summer: with an airtight container, a filter, and a little patience (cold steeping is the only part that cannot be rushed), you can make a concentrate that keeps in the refrigerator for weeks. If you liked this idea, don’t miss our guide to homemade cold summer drinks, or return to our complete guide to kitchen gadgets.
Frequently Asked Questions About Cold Brew
How does cold brew differ from regular iced coffee?
Traditional iced coffee is made by pouring hot coffee over ice cubes, which dilutes it and can accentuate its bitterness. Cold brew is made by letting ground coffee steep in cold water for 12–18 hours without ever exposing it to heat, resulting in a smoother, less acidic coffee with a more pronounced natural sweetness.
Do I need a special coffee maker to make cold brew?
No. Cold brew does not require a coffee maker or any machinery: all you need is an airtight container for steeping in the refrigerator and a fine filter to strain the coffee grounds once the process is complete.
How long does cold brew concentrate keep?
Stored in an airtight container in the refrigerator, cold brew concentrate keeps well for 1–2 weeks, allowing you to prepare it once and have cold coffee ready for several days.
