How to Make the Perfect Plunger Coffee (French Press Guide)

The plunger — or French press, if you prefer — is one of the simplest and most satisfying ways to make coffee at home. No expensive machine, no paper filters, no complicated technique. Just coffee, hot water, and a few minutes of patience.

Despite its simplicity, a lot of people don't get th e best out of their plunger. The coffee ends up bitter, muddy, or weak — and they assume that's just how plunger coffee tastes. It's not. With a few small adjustments, a plunger can produce a rich, full-bodied, clean cup that rivals much more expensive brew methods.

Here's our recipe for the perfect plunger coffee, plus the most common mistakes and how to avoid them.

What You'll Need

A plunger (French press) — any size will work. The most common sizes are 3-cup (350ml) and 8-cup (1 litre).

Coarsely ground coffee — this is important. The grind should look like raw sugar or coarse breadcrumbs. If you're buying pre-ground, make sure it's specifically ground for plunger.

Hot water — just off the boil, around 93–96°C. An electric kettle is fine; just let it sit for 30–60 seconds after it clicks off.

A timer — your phone works perfectly.

Optional but helpful: A kitchen scale for measuring your coffee accurately.

The Recipe

Ratio: 65g of coffee per litre of water. For a single cup (250ml), that's about 15–17g — roughly two heaped tablespoons.

Step 1: Preheat your plunger. Pour some hot water into the empty plunger, swirl it around, then tip it out. This keeps the brew temperature stable and prevents the glass from cracking with the thermal shock.

Step 2: Add the coffee. Put your coarsely ground coffee into the preheated plunger.

Step 3: Add the water. Pour your hot water (just off the boil) over the grounds, filling to the desired level. Pour steadily to make sure all the grounds are saturated.

Step 4: Start your timer. Don't plunge yet. Let the coffee steep for exactly 4 minutes.

Step 5: Stir gently (optional). After about 1 minute, you can give the brew a gentle stir with a spoon to break up the crust of grounds that forms on the surface. This helps ensure even extraction. Some people skip this step — try it both ways and see what you prefer.

Step 6: Plunge slowly. When your 4 minutes are up, place the lid on and press the plunger down slowly and steadily. Don't force it — if there's a lot of resistance, your grind is probably too fine.

Step 7: Pour immediately. Don't leave the coffee sitting in the plunger after pressing. The grounds are still in contact with the water, which means the coffee will continue to extract and become bitter. Pour all the coffee into cups or a carafe straight away.

Common Plunger Mistakes

Using the Wrong Grind Size

This is the number one mistake. If your grind is too fine (like espresso grind), the coffee will over-extract during the 4-minute steep, producing a bitter, muddy cup with a thick layer of sludge at the bottom. A plunger needs a coarse grind — significantly chunkier than what you'd use for espresso or filter.

If you're ordering from Cascade, just select "plunger" as your grind option and we'll grind it to the right coarseness.

Steeping Too Long

Four minutes is the sweet spot for plunger coffee. Leaving it longer — 6, 8, 10 minutes — doesn't make it stronger in a good way. It over-extracts the bitter compounds and makes the coffee harsh and unpleasant. If you want stronger coffee, use more grounds, not more time.

Using Boiling Water

Water straight from a rolling boil (100°C) is too hot. It scorches the coffee and pulls out bitter, astringent flavours. Let the kettle sit for 30–60 seconds after it boils — you're aiming for around 93–96°C. If you have a temperature-controlled kettle, even better.

Not Pouring Straight Away

Once you've plunged, the coffee and water are still in contact. If you leave it sitting in the plunger, it keeps extracting and gets progressively more bitter. Always pour all the coffee out immediately after plunging.

Using Too Little Coffee

If your plunger coffee tastes weak and watery, the most common reason is simply not using enough coffee. Two tablespoons per 250ml is a good starting point, but measure by weight if you can — 15–17g per cup gives you a much more consistent result than eyeballing it with a spoon.

Tips for Even Better Plunger Coffee

Use filtered water. Since coffee is 98% water, the quality of your water matters. A simple filter jug removes chlorine and improves the taste noticeably.

Use fresh coffee. Coffee is at its best within a month of roasting. Stale beans produce flat, dull coffee regardless of your technique. Check the roast date on the bag.

Clean your plunger properly. Old coffee oils build up in the mesh filter and turn rancid, adding stale off-flavours to your brew. Disassemble the filter and wash it thoroughly after each use.

Try the James Hoffmann method. For an even cleaner cup, skip the stir and instead wait for the crust to fall naturally at around the 4-minute mark. Then scoop off the foam and floating grounds with a spoon before plunging very gently — just enough to push the filter below the surface, not all the way to the bottom.

Get Plunger-Ready Coffee

All our coffees are available in plunger grind — ground fresh to order at the right coarseness for a perfect steep. Browse our range and start brewing better plunger coffee today.