Whole bean coffee is the starting point of any quality cup. But the speciality coffee world can feel overwhelming at first: Arabica, Robusta, Ethiopian Yirgacheffe, natural process, washed process... Where do you even start?
This guide breaks down the essentials of coffee bean types clearly and practically, so you can choose the right bean for your brewing method and your palate.
Roast freshness matters more than the price of the beans. A coffee at 15 €/250g roasted 6 months ago tastes worse than one at 8 €/250g roasted last week. Always look for the roast date on the bag, not the best-before date.
Arabica vs Robusta: The Fundamental Difference
Arabica (Coffea arabica)
Arabica accounts for 60-70% of world production and is the basis of all specialty coffee. It is grown between 600 and 2.200 metres of altitude in the tropical belt: Ethiopia, Colombia, Guatemala, Costa Rica, Kenya and Yemen are its main quality origins.
Its features: greater aromatic complexity (fruit, flowers, chocolate, nuts), bright acidity, medium body and lower caffeine content (1-1,5%). The flavour varies enormously depending on origin and processing.
Robusta (Coffea canephora)
Robusta has more caffeine (2-2,7%), more bitterness, more body and generates more crema in espresso. It grows at lower altitude and resists pests better. Vietnam, Uganda and Brazil are the main producers.
In traditional Italian espresso blends, Robusta (20-40% of the mix) provides the dense, long-lasting crema so prized in Mediterranean coffee culture. On its own it can taste harsh and earthy, but well blended it balances Arabica perfectly.
The Main Origins and Their Flavour Profiles
| Origin | Tasting notes | Acidity | Best for |
|---|---|---|---|
| Ethiopia (Yirgacheffe) | Florals, bergamot, peach | High | V60, AeroPress, filter |
| Colombia (Huila) | Caramel, hazelnut, orange | Medium | Espresso, bean-to-cup |
| Guatemala (Antigua) | Dark chocolate, walnut, spices | Medium-low | Espresso, Chemex |
| Brazil (Cerrado) | Milk chocolate, walnut | Low | Espresso, blends |
| Kenya (AA) | Blackcurrant, tomato, lime | High | Filter, cold brew |
| Yemen (Mocha) | Wine, spices, nuts | Medium | Moka, espresso |
Roast Levels and How They Affect Flavour
Light roast
The bean keeps most of the characteristics of its origin. Acidity is high, the body light, and fruity and floral aromas take centre stage. Roast temperature: 180-205°C. Ideal for filter methods (V60, Chemex, AeroPress) that express aromatic complexity well.
Medium roast
The perfect balance between the characteristics of the origin and the notes of the roast. Moderate acidity, medium body, notes of chocolate, caramel and nuts. Temperature: 210-220°C. It is the most versatile roast: it works well in both espresso and filter. Ideal for bean-to-cup machines.
Dark roast
Intense heat develops bitterness and smoky notes that dominate over the characteristics of the origin. The bean has visible oils on the surface. Temperature: 225-245°C. It produces espressos with plenty of body and a dense crema, low in acidity. It is the roast of traditional Italian coffee.
Coffee Processing: Natural, Washed and Honey
- Washed: The bean is separated from the cherry with water before drying. Clean profile, bright acidity, well-defined fruity notes. The most common process in Ethiopia, Colombia and Kenya.
- Natural (dry process): The whole cherry is dried in the sun for 3-6 weeks. The bean absorbs the sugars from the fruit, producing sweeter, winier flavours. Very popular in Brazil and Ethiopia.
- Honey (semi-washed): A middle ground: part of the pulp is removed but some of the mucilage is left on. A profile balanced between natural and washed. Popular in Costa Rica and El Salvador.
How to Choose the Right Coffee for Your Machine
- Bean-to-cup machine: An espresso blend or 100% Arabica with a medium-dark roast. Avoid very light roasts (too dense for built-in grinders) and very dark ones (oily on the surface).
- Semi-automatic machine (espresso): Single-origin Arabica or a premium medium-roast blend. The more control the machine gives you, the more you can experiment with light roasts.
- V60 or Chemex: Single-origin Arabica, light or medium roast. Ethiopian, Kenyan and Colombian coffees shine especially in these methods.
- AeroPress: It works with any roast and any origin. It is the most versatile method for experimenting.
- Italian moka pot: An espresso blend or a medium-dark roast Arabica/Robusta. The moka pot extracts at high temperature and assumes coffees that can take intense extraction.
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What is the difference between Arabica and Robusta coffee?
Arabica accounts for 60-70% of world production. It has more aromatic complexity, less caffeine (1-1,5%) and bright acidity. It is grown at higher altitudes. Robusta has more caffeine (2-2,7%), more body and less acidity. It is used in espresso blends to add crema and in instant coffee.
Which roast is best for a bean-to-cup machine?
Bean-to-cup machines work best with medium or medium-dark roasts. Very light roasts are denser and can strain the grinder. Very dark roasts have oils on the surface that can clog the milk circuit. A medium-dark Italian espresso blend is the ideal starting point.
What does it mean for a coffee to be single origin?
A single origin coffee comes from a single farm, region or country, rather than being a blend of several origins. That lets you appreciate the specific characteristics of the terroir (altitude, soil, climate). Ethiopian, Colombian and Guatemalan coffees are the most popular in the Spanish specialty market.
How long do coffee beans last once opened?
Whole beans keep their optimum quality for 2-4 weeks after opening the bag, if stored in an airtight opaque container at room temperature. Avoid the fridge (condensation damages the aromas). Buy in quantities of 250-500g and use them within 2-3 weeks.