Coffee Knowledge
Everything you need to know about coffee - from the plant to the cup. Our encyclopedia for coffee lovers, beginners, and professionals.
My coffee tastes sour – what can I do?
Sour coffee indicates under-extraction. Solution: Grind finer, use hotter water, or brew longer. → Grind Size Guide
My coffee tastes bitter – what can I do?
Bitter coffee points to over-extraction. Solution: Grind coarser, lower the water temperature, or shorten the brew time. → Bitter Coffee Guide
Which grind size for espresso, filter, or French Press?
Espresso = very fine, Filter = medium, French Press = coarse. The right grind size is the most important factor for good coffee. → Complete Grind Guide
How do I store coffee properly?
Store in an airtight, opaque container at room temperature. Avoid the fridge! Consume within 4–6 weeks after the roast date. → Coffee Storage Tips
How much coffee per cup?
The golden ratio: 60 g per liter of water (approx. 12 g per 200 ml cup). For espresso: 18 g for a double shot. → Coffee Dosing Guide
Is a coffee subscription worth it?
Yes – you get freshly roasted beans delivered regularly, often at a better price, and discover new varieties. Ideal for anyone who doesn't want to run out of great coffee. → Subscription Guide
Which coffee grinder for home use?
A burr grinder is essential for good coffee. Hand grinders start around 50 €, electric ones from 100 €. Avoid blade grinders! → Grinder Buying Guide
What is specialty coffee?
Specialty coffee scores 80+ points (SCA scale), is traceable to origin, and freshly roasted. The difference to commodity coffee: quality over mass production. → Specialty Coffee Explained
What's the difference between Arabica and Robusta?
Arabica is milder, fruitier, and has less caffeine. Robusta is bolder, earthier, and has almost twice the caffeine. Espresso blends often combine both. → Arabica vs. Robusta
What water temperature for coffee?
Ideal is 92–96 °C (197–205 °F) – not boiling! Water that's too hot will scorch the coffee and make it bitter. Simply let the kettle sit for 30 seconds after boiling. → Brewing Basics
Why is freshly roasted coffee better?
After roasting, coffee quickly loses aroma and freshness. Supermarket coffee is often months old. Freshly roasted (max. 4–6 weeks) – you can taste the difference immediately. → Roast Date vs. Best Before
Decaf coffee – how does it work?
There are several methods: Swiss Water Process (chemical-free), CO₂ method, or solvents. Good decaf today tastes almost like regular coffee. → Decaf Guide
What does "single origin" mean?
Single origin means the coffee comes from one single growing region (or farm). Unlike blends, it showcases the typical flavor characteristics of its origin. → Coffee Growing Regions
Which water for great coffee?
Coffee is 98% water! Ideal is soft to medium-hard water (approx. 50–150 ppm). Too much limescale makes coffee taste flat and damages your machine. A water filter helps. → Brewing Basics