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How do I make a cold brew with a French press?

Quick answer

To make cold brew in a French press, combine coarse-ground coffee with room-temperature water at a 1:4 or 1:5 ratio. Stir gently, place the lid on without plunging, and let it steep for 12 to 24 hours. After steeping, press the plunger down slowly to filter the grounds, resulting in a smooth, low-acidity cold brew concentrate.

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The real story

Cold brew is a method of extraction that relies on time rather than heat to pull flavor from the coffee beans. Because you are not using hot water, the chemical extraction process is much slower, which results in a cup that is significantly lower in acidity and bitterness compared to hot-brewed coffee. The French press is an ideal tool for this because it acts as both the steeping vessel and the filter.

To start, you will need a coarse grind—think of the texture of sea salt. A fine grind will make the coffee difficult to plunge and can lead to a muddy, over-extracted cup. Use a ratio of 1 part coffee to 4 or 5 parts water by weight. For example, if you use 100 grams of coffee, use 400 to 500 grams of water. Pour the water over the grounds, ensuring they are all saturated, and give it a gentle stir.

Place the lid on the French press to keep out dust, but do not push the plunger down yet. Let the mixture sit at room temperature or in the refrigerator for 12 to 24 hours. The longer you steep, the stronger the concentrate will be. Once the time is up, slowly push the plunger down. The metal mesh filter will separate the grounds from the liquid, leaving you with a potent concentrate.

This concentrate is very strong and is meant to be diluted. When you are ready to drink, mix it with water, milk, or ice at a ratio of 1:1 or to your personal preference. Because cold brew is so smooth, it is a versatile base for iced coffee drinks or even as a component in cocktails.

In practice, the French press method is one of the most accessible ways to make cold brew at home. It requires no special equipment beyond what you likely already own. Experiment with different steeping times and coffee-to-water ratios to find the strength that suits your palate. Remember that because you are using a metal filter, your cold brew will have more body and texture than one made with a paper filter, which is a hallmark of the French press style.

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