Using boiling water – Boiling water actually burns the coffee grounds and ruins the taste. Coffee is best when the water is 94°C, so if you just leave the kettle for a minute after it boils you’ll save your coffee grounds, and your brew.
Using a blade grinder – Blade grinders are evil. They blend the coffee into different sizes, so you don’t get any consistency. This means some grounds will be become bitter and over-extracted while at the same time others will be sour and under-extracted. Always use a burr grinder or buy pre-ground coffee (although it’s much better to grind fresh).
Putting coffee in the fridge/freezer – This is pretty much a crime in the world of coffee as these places introduce moisture, which is bad. Be sure to store coffee in a cool, dry place – out of direct light and away from air.
Storing ground coffee in a clear jar – This may seem strange, but the light that hits the coffee in a clear jar ruins the taste – same as storing spices – and also air makes the smell and taste fade much sooner.
Over extracting Cafetiere coffee – You should brew cafetiere coffee for 4 mins and then serve immediately. If you leave it sitting there for longer, it will become bitter and nasty.
Need more brewing advice? Take a look at our Brew Guide