All coffee guides · Filter Coffee
French press coffee steeps in water before a metal mesh separates the grounds. The filter lets oils and some fine particles into the cup, giving it a full body. Grind, steep time and gentle pouring affect the result.
French press is an immersion method: the coffee grounds are fully submerged in water for the entire steep, and extraction continues until you pour. Unlike pour-over, where water flows through the coffee bed and fresh water is constantly introducing new solvent, immersion brewing reaches an equilibrium — as the water becomes saturated with dissolved compounds, extraction slows. As immersion brewing progresses, extraction slows. A few extra minutes can therefore have less effect than the same time change in a flowing-water method. The metal filter allows oils and fine particles to pass into the cup, which creates body and texture that paper-filtered methods remove.
A coarse or medium-coarse grind is a useful starting point for a French press, but recipes differ. A finer grind can also work with a suitable steep and pouring technique; it does not automatically over-extract. The metal filter allows some fine particles into the cup. Letting grounds settle and pouring gently can reduce sediment. Compare taste and texture before adjusting the grind.
A good starting ratio for French press is 1:15 to 1:17 — 60-67g of coffee per litre of water. For a standard 350ml French press, this means approximately 22-24g of coffee. For a full 1-litre press, approximately 60-65g. Start with 1:15 for a stronger cup and 1:17 for a lighter one, adjusting to taste from there. Water temperature should be just off the boil — 93-96 degrees Celsius. Boiling water (100 degrees) over-extracts some of the sharper compounds in the first contact; slightly below boiling extracts more selectively. If you do not have a thermometer, letting a just-boiled kettle sit for 45-60 seconds gets you close enough.
Pour water over the grounds, stir briefly to ensure all grounds are wet, place the lid on with the plunger fully raised, and steep for 4 minutes. At 4 minutes, press the plunger slowly and steadily — not with force. A correctly ground and dosed French press should require gentle, continuous pressure to plunge over about 20-30 seconds. If the plunger drops with no resistance, the grind is too coarse or the dose too low. If it is very difficult to press, the grind is too fine. Once plunged, pour immediately — do not leave the pressed coffee sitting on the grounds, as extraction continues and the cup becomes bitter within a few minutes.
The French press metal mesh filter is what makes the method distinctive. Coffee oils — predominantly cafestol and kahweol — are retained by paper filters but pass freely through metal mesh into the cup. These oils contribute body, richness and a textural weight that paper-filtered coffee lacks. They also make French press coffee the most effective at conveying origin character in the oils: natural-processed and high-altitude beans often show distinctly more aromatic complexity in French press than in pour-over. The trade-off is that unfiltered coffee also contains higher levels of diterpenes, which have been associated with modest increases in LDL cholesterol in large consumption quantities — relevant context for people who drink multiple large French press servings per day.
Fine grind is the most common cause of muddy, gritty, bitter French press coffee — coarsen the grind significantly. Not stirring after adding water means dry grounds float on top and extract unevenly — stir immediately after pouring. Leaving the coffee on the grounds after plunging continues extraction and produces bitterness — pour everything out immediately. Using too little coffee produces a watery, flat result — weigh the dose rather than estimating by volume. Pressing too hard or too fast agitates the grounds and forces fine particles through the mesh — press slowly with steady gentle pressure. If the coffee consistently has excessive sediment in the cup despite a coarse grind, try a French press with a tighter-mesh filter, or let the cup sit undisturbed for one minute before drinking so the sediment settles.
Browse all 98 coffee guides or start a free espresso journal on Baristalog.