A lot of people use "cold brew" and "iced coffee" interchangeably, but they are actually made in completely different ways, and that difference changes the whole flavor. Iced coffee is regular hot-brewed coffee cooled down and poured over ice. Cold brew is never touched by hot water at all, coarse coffee grounds are steeped directly in cold or room-temperature water for a long stretch of time, usually 12 to 24 hours.
That slow, cold extraction pulls different compounds out of the coffee than hot water does. Specifically, it extracts fewer acidic compounds like chlorogenic, citric, and malic acid, resulting in a drink with meaningfully lower acidity than hot-brewed coffee, even when both start from the same beans. Hot coffee has been found to contain up to 50 percent more acid than cold brew despite similar pH levels. That is why cold brew tends to taste smoother, sweeter, and easier on sensitive stomachs.
To make it at home, start with a coarse grind, similar to what you would use for a French press. A good starting ratio is about 1 part coffee to 4 parts water for a concentrate you will dilute later, or roughly 1 part coffee to 8 parts water if you want something ready to drink straight away.
You do not need any special equipment to make this work, a large mason jar, a French press, or even a pitcher with a fine strainer on hand will all get the job done. Dedicated cold brew makers with a built-in filter are convenient if you make this often, but they are solving a straining problem, not a brewing one, the actual extraction happens the same way no matter what container you use.
Combine the grounds and water in a jar or pitcher, stir briefly to make sure everything is saturated, and cover it. Let it sit at room temperature or in the fridge for 12 to 24 hours, longer generally means stronger and slightly more bitter, so start around 14 to 16 hours and adjust from there based on taste.
Once it is done steeping, strain it. A fine mesh strainer lined with a coffee filter or cheesecloth works well, you want to remove as much sediment as possible since cold brew grounds do not settle the way hot-brewed grounds do. What you are left with is either ready to drink over ice, or a concentrate you can dilute with water or milk to your preferred strength.
Cold brew keeps well too, sealed and refrigerated, a batch can last around a week to ten days without losing much quality, which makes it one of the more practical things to batch-make on a weekend. If you want to taste a shop's take on the format, Localhost Coffee & Co. in Concepcion Uno has a Cold Brew Lemonade on their menu that is worth trying as a reference point for how far you can push the format creatively.
Once you have a basic batch down, it is a genuinely flexible base to build on. Mix it with condensed milk for a cold brew version of a Spanish latte, add a splash of flavored syrup, or pour it over vanilla ice cream for an affogato-style treat. Because cold brew concentrate is so strong, it can absorb these additions without ever tasting watered down, which is part of why cafes love using it as a base for seasonal specialty drinks.
Grinder choice matters more for cold brew than for most other methods, since a burr grinder produces a much more even coarse grind than a blade grinder, which tends to create a mix of large chunks and fine dust in the same batch. That inconsistency leads to uneven extraction, some grounds under-extracted and bitter dusty bits over-extracted, muddying the otherwise clean flavor cold brew is known for. If you already own a burr grinder for other brewing methods, it is worth using it here too rather than defaulting to whatever pre-ground option is easiest.
Temperature during steeping is worth paying attention to as well. Steeping in the refrigerator produces a slightly cleaner, brighter result and takes a little longer, generally closer to 20 to 24 hours, while steeping at room temperature works faster, often fully extracted by the 12 to 14 hour mark, but can develop a marginally more bitter edge if left too long since extraction continues faster at warmer temperatures. Neither is wrong, but knowing this lets you adjust your timing intentionally rather than guessing.
If you have ever had nitro cold brew, the pressurized, creamy-textured version served on tap at some specialty cafes, that is simply regular cold brew concentrate pushed through a nitrogen-infused tap, which creates tiny bubbles similar to a stout beer and gives it a naturally sweet, almost velvety mouthfeel without adding any actual cream or sugar. It requires specialized equipment to replicate exactly at home, but it is a good example of how far a simple base recipe like this can be pushed once you understand the fundamentals. James Hoffmann has run some of the more rigorous side-by-side cold brew experiments on YouTube if you want to go deeper than a standard recipe.
If bitterness and acidity are generally what keep you from enjoying coffee, this is one of the more approachable things to try making yourself before writing off coffee entirely. For a gentler, more dessert-like alternative built the same afternoon, see our guide to coffee drinks for people who don't usually like coffee. Sprudge's compendium of brew guides is also worth bookmarking once you start branching into other methods.