BREWING

How do I make cold brew with a French press?

Quick answer

Making cold brew with a French press is simple: combine coarse-ground coffee and room-temperature water in a 1:4 or 1:5 ratio, stir, and let it steep for 12–24 hours. Once finished, press the plunger down slowly to filter the grounds, resulting in a smooth, concentrated cold brew ready to be diluted with water or milk.

The real story

Cold brew is a forgiving and highly rewarding method of home brewing that highlights the natural sweetness of coffee while minimizing acidity. Using a French press is an ideal way to start because it combines the brewing vessel and the filtration system into one convenient tool. Unlike hot brewing, which uses heat to extract flavors quickly, cold brewing relies on time to gently pull compounds from the coffee grounds.

To begin, use a coarse grind—similar to sea salt—to ensure the coffee doesn't pass through the French press mesh filter. A common starting point is a 1:4 or 1:5 ratio of coffee to water by weight. For example, if you use 100 grams of coffee, use 400 to 500 grams of filtered water. Pour the water over the grounds, stir gently to ensure all grounds are saturated, and place the lid on the press without pushing the plunger down.

Let the mixture steep at room temperature or in the refrigerator for 12 to 24 hours. The longer the steep time, the more intense the flavor profile will be. Once the time is up, slowly depress the plunger. Because the grounds have been sitting for so long, the plunger may offer more resistance than usual; take your time to avoid forcing fine particles through the mesh.

The resulting liquid is a cold brew concentrate. Because it is highly potent, it is meant to be diluted. Most enthusiasts find that a 1:1 ratio of concentrate to water or milk is a perfect starting point, but you should adjust this based on your personal preference for strength. This concentrate can be stored in the refrigerator for up to two weeks, making it a convenient option for busy mornings.

In practice, the French press method is excellent for experimentation. Because you control the grind size, the ratio, and the steep time, you can easily tweak the recipe to suit your favorite beans. If your brew tastes too bitter, try a slightly coarser grind or a shorter steep time. If it tastes weak, increase the coffee-to-water ratio. This flexibility is exactly why cold brew remains a staple for home brewing enthusiasts.

Sources we lean on
  • · https://www.ncausa.org/coffee-topics/how-to-brew-coffee
  • · https://sca.coffee/sca-news/read/cold-brew-coffee-a-guide-to-the-basics