The Complete Handbook of French Presses

Chapter 1: Understanding French Presses

A French press is an immersion brewer: hot water and ground coffee sit together in a cylinder for a set amount of time, the grounds settle and are separated from the liquid by a mesh screen, and the brewed coffee is poured into a cup. That's the entire mechanical process. It involves no pump, no pressure chamber, no heating element, no valve, and no electronics. It is the simplest form of coffee brewing apparatus that exists, and because of that simplicity, it is also one of the most widely used in professional and serious-hobbyist settings.

The device consists of four functional parts: a cylindrical vessel (usually glass, stainless steel, or ceramic), a plunger rod connected to a circular disk or plate, a fine metal mesh screen attached to or surrounding that disk, and a lid assembly. Water is heated separately—in a kettle, urn, or other source—poured over coarsely ground coffee inside the cylinder, and allowed to steep. After the specified brew time (typically three to five minutes), the plunger is pressed downward slowly, forcing the mesh screen toward the bottom of the cylinder and trapping the spent grounds below the brew line. The clear liquid above the mesh can then be poured off into cups.

This immersion method produces a cup profile distinct from other brewing approaches. Because the grounds remain in contact with the water for the entire brew period, the extraction happens more completely and uniformly than it does in drip or pour-over