10 Common French Press Mistakes | And How to Avoid Them
A French press is one of the easiest ways to brew exceptional coffee, but like any brewing method, a few small mistakes can have a big impact on the final cup.
The good news is that most of these issues are easy to fix.
Whether you're just getting started or you've been brewing coffee for years, avoiding these common mistakes will help you enjoy richer, smoother, and more consistent coffee every time.
1. Using Coffee That's Too Finely Ground
This is the most common mistake.
Fine coffee grounds extract too quickly and easily pass through the metal filter.
The result is often:
- Bitter coffee
- Muddy texture
- Excess sediment
- A plunger that's difficult to press
The Fix
Use a coarse grind that resembles coarse sea salt.
2. Using the Wrong Coffee-to-Water Ratio
Eyeballing your coffee can lead to inconsistent results.
One day your coffee is too strong.
The next day it's too weak.
The Fix
Measure your coffee whenever possible.
A great starting point is:
65 grams of coffee for every 1,000 ml of water.
Consistency is one of the easiest ways to improve your coffee.
3. Brewing with Water That's Too Hot
Boiling water can scorch the coffee and create excessive bitterness.
The Fix
Heat your water to approximately 195–205°F (90–96°C).
If you've just boiled your kettle, simply let it sit for about 45 seconds before pouring.
4. Brewing for Too Long
Many people assume longer brewing creates stronger coffee.
In reality, it usually creates over-extraction and bitterness.
The Fix
Aim for a brewing time of approximately four minutes.
If you'd like a stronger cup, add a little more coffee instead of extending the brew time.
5. Pressing the Plunger Too Quickly
Forcing the plunger downward can stir up fine particles and create unnecessary resistance.
The Fix
Press slowly and steadily.
The plunger should move with gentle, even pressure.
If it feels extremely difficult, your grind is probably too fine.
6. Leaving Coffee Sitting in the French Press
Even after you've pressed the plunger, the coffee continues extracting while it remains in the brewer.
Over time, this can make your coffee noticeably more bitter.
The Fix
Pour all of the coffee into mugs or a thermal carafe immediately after brewing.
7. Using Stale Coffee Beans
Even perfect technique can't rescue stale coffee.
Coffee loses aroma and flavor over time, especially after it's ground.
The Fix
Buy whole beans whenever possible and grind them just before brewing.
Fresh coffee makes a dramatic difference.
8. Not Cleaning the French Press Regularly
Coffee oils build up surprisingly quickly.
Eventually, those old oils can give every new cup a stale or bitter taste.
The Fix
Rinse your French press after every use and wash it with mild dish soap.
Deep clean the filter assembly every few weeks to remove accumulated oils.
9. Using a Blade Grinder
Blade grinders chop coffee into uneven pieces.
Some particles become powder while others remain large chunks.
This causes uneven extraction.
The Fix
A burr grinder produces grounds that are much more consistent, resulting in better flavor and more repeatable brews.
10. Changing Too Many Variables at Once
If your coffee doesn't taste right, it's tempting to change everything.
Unfortunately, doing so makes it impossible to know what actually improved the coffee.
The Fix
Adjust one variable at a time.
For example:
- Change the grind size.
- Brew another cup.
- Taste the difference.
- Then adjust the coffee ratio if needed.
Small, deliberate changes produce the best long-term results.
A Simple Recipe That Works
If you're not sure where to begin, this recipe is an excellent starting point.
- Water: 1,000 ml
- Coffee: 65 g
- Grind: Coarse
- Water Temperature: 195–205°F (90–96°C)
- Brew Time: 4 minutes
- Press: Slowly and evenly
From there, make small adjustments based on your personal taste.
Frequently Asked Questions
Why is my French press coffee bitter?
The most common causes are a grind that's too fine, brewing for too long, or using water that's too hot.
Why does my coffee taste weak?
Your grind may be too coarse, your coffee-to-water ratio may be too low, or your coffee may be under-extracted.
Why is the plunger difficult to press?
This usually indicates that your coffee is ground too finely.
Should there be sediment in my coffee?
A small amount is completely normal. French presses use a metal filter, which allows some fine coffee particles to remain in the cup.
Final Thoughts
Great French press coffee isn't about complicated techniques or expensive equipment. It's about getting the fundamentals right.
Use fresh coffee, grind it coarsely, measure your ingredients, brew for about four minutes, and clean your French press regularly. Avoiding these common mistakes will dramatically improve the flavor and consistency of every cup.
The BREVIK French Press Kit was designed with simplicity in mind, making it easy to follow proven brewing techniques and enjoy exceptional coffee at home for years to come.