The French press — or plunger, if you grew up with one on an Australian kitchen bench — is the most forgiving way to brew genuinely good coffee at home. Full immersion means every gram of coffee spends the same time in the water, so results are easy to repeat and easy to fix. This guide covers the numbers that matter, plus the technique that takes plunger coffee from gritty to clean: the break and skim. We roast to order in Adelaide, so everything here assumes fresh beans.

What ratio of coffee to water for French press?

Use a 1:15 ratio — 1 gram of coffee for every 15 grams (millilitres) of water. That's 20 g of coffee to 300 ml for one large mug, or 60 g to 900 ml for a full 1-litre press. It sits comfortably inside the long-standing specialty guideline of roughly 60–70 g of coffee per litre of water.

Weigh your coffee if you can — a "heaped tablespoon" can vary from 5 g to 12 g, and that swing explains most inconsistent home brews. Prefer a bolder cup? Move to 1:14. Lighter and more tea-like? Try 1:16.

What grind size should you use for French press?

Grind coarse — about the texture of coarse sea salt. French press uses a metal mesh filter rather than paper, so fine particles slip straight through into your cup and over-extract during the 4-minute steep. Coarse grounds extract evenly, plunge cleanly, and leave far less sediment behind.

Consistency matters as much as size. Blade grinders chop beans into boulders and dust, and it's the dust (fines) that turns a plunger brew muddy and bitter. A burr grinder produces uniform coarse particles — the Fellow Ode Gen 2 grinder is built for filter and immersion brewing and excels at this coarse range. And grind just before you brew: ground coffee loses its aromatics in minutes.

How long should French press steep?

Steep for 4 minutes. Pour water at 93–96°C over the grounds, give a gentle stir, then leave the press alone — no plunging early. Four minutes at a coarse grind reliably lands in the balanced sweet spot: fully developed sweetness without the harsh bitterness of over-extraction.

In practice: boil the kettle, wait 30 seconds, pour. If your cup tastes sour or thin at 4 minutes, extend to 5–6 minutes before reaching for a finer grind. Because the grounds settle, extraction slows naturally over time — a French press is hard to ruin by waiting.

How do you brew French press, step by step?

Our standard recipe for a 900 ml press — enough for two big mugs — at a 1:15 ratio with a 4-minute steep and the break-and-skim technique.

Dose: Weigh 60 g of fresh whole beans (use 20 g per 300 ml if scaling down).
Grind: Grind coarse — coarse sea salt texture — right before brewing.
Preheat: Rinse the press with hot water and discard — a cold press drops brew temperature fast.
Boil: Heat water to 93–96°C (boil, then rest 30 seconds).
Pour: Add the grounds, start a timer, and pour 900 ml of water, saturating everything evenly.
Stir: One gentle stir to knock down the dry crust, then rest the lid loosely on top — plunger up — to hold heat.
Steep: Wait 4 minutes. Hands off.
Break and skim: At 4 minutes, stir the floating crust gently so the grounds sink, then use two spoons to skim off the foam and floating bits. This is the single biggest upgrade to plunger coffee.
Settle: Wait another 1–2 minutes for the remaining grounds to drop.
Plunge gently and pour: Press the plunger just below the surface — ramming it to the bottom stirs sediment back up — and pour every cup straight away. Coffee left on the grounds keeps extracting and turns bitter.

A well-built press helps: the double-wall stainless MiiR Standard French Press holds temperature through the steep far better than thin glass.

Why is my French press muddy?

A muddy, gritty French press almost always comes from fines — coffee dust created by an inconsistent or too-fine grind — passing through the metal mesh. Fix it by grinding coarser on a burr grinder, skimming the surface after the 4-minute break, and plunging gently rather than pressing to the bottom.

Run the checklist in order. Grind: a blade grinder is usually the cause — no technique compensates for dust. Technique: break and skim at 4 minutes, let the grounds settle, stop the plunger just under the surface. Serving: decant the whole press immediately. Do all three and a plunger brew gets close to paper-filter clarity while keeping the rich body immersion does best.

Why does my French press taste bitter — or weak?

Bitterness means over-extraction: the grind is too fine, or the brewed coffee sat on the spent grounds after plunging. Weak, sour coffee means under-extraction or under-dosing: the grind too coarse for your steep time, the water too cool, or the dose short of the 1:15 ratio.

For bitterness: grind coarser, keep water at or below 96°C, and decant everything the moment you plunge. For a weak cup: check the dose first — most "weak coffee" complaints are 40 g of coffee doing a 60 g job. If the dose is right but the cup is sour and hollow, extend the steep to 5–6 minutes. One adjustment per brew.

Which coffee beans work best in a French press?

Medium and medium-dark roasts shine in a French press. Full immersion plus the metal filter delivers a heavy, rounded body that flatters chocolate, caramel, and nut characters, while very light roasts can taste muted without paper-filter clarity. Freshness matters too — aim for beans within a few weeks of roast.

From our bench, the Tanzania Peaberry (medium-dark) brings dark-chocolate depth that immersion amplifies beautifully, and Tres Meninas (Brazil) is a natural plunger coffee — sweet, nutty, and smooth at 1:15. Both come from the Adelaide-roasted range, roasted to order so they land at your door inside the freshness window.

Frequently asked questions

How much coffee do I use for a 1-litre French press?

About 60–65 g for a full litre at the 1:15 ratio. A "1-litre" press really holds closer to 900 ml once grounds and plunger are in, so 60 g is the everyday number. Scale down to 20 g per 300 ml mug.

Can I use pre-ground coffee in a French press?

Yes, if it's ground coarse. Supermarket pre-ground is usually too fine for a plunger and brews bitter and silty. Ask for a coarse "plunger" grind — though whole beans ground just before brewing always taste better.

Does water temperature really matter for French press?

Yes. The accepted range is roughly 90–96°C. Water straight off a rolling boil can push extraction harsh, while water below about 88°C under-extracts and tastes sour. Boil, wait 30 seconds, pour — no thermometer needed.

How do I clean a French press properly?

Empty the spent grounds into the bin or compost (not the sink), rinse the beaker, and weekly unscrew the plunger to wash the mesh screen in warm soapy water. Old coffee oils trapped in the mesh go rancid and flatten even the freshest beans.