Many people drink coffee every day without knowing how much work is involved in producing it. Understanding how coffee is made reveals the long journey from a coffee farm to the finished cup.
Growing Coffee Plants
Coffee grows best in warm, tropical climates with suitable rainfall, shade and rich soil. Most coffee is produced in regions located near the equator.
The two main commercial coffee species are Arabica and Robusta. Arabica coffee is generally known for its smooth and complex flavour, while Robusta usually has a stronger taste and higher caffeine content.
Harvesting Coffee Cherries
Coffee beans grow inside fruits known as coffee cherries. When the cherries become ripe, they are usually red or yellow.
Farmers harvest the cherries either by hand or with machines. Hand-picking allows workers to select only ripe cherries, but it requires more time and labour.
Processing the Coffee Beans
After harvesting, the coffee beans must be removed from the cherries. Two common processing methods are the washed method and the natural method.
In the washed method, the fruit is removed before the beans are dried. This process often produces a cleaner and brighter flavour.
In the natural method, the whole cherries are dried before the beans are removed. This can create sweeter and fruitier flavours.
Drying and Sorting
The beans are dried until they reach an appropriate moisture level. They are then cleaned, graded and sorted according to size, quality and appearance.
Defective beans may be removed to improve the overall quality of the final coffee.
Roasting Coffee Beans
Green coffee beans have little resemblance to the dark, aromatic beans found in shops. Roasting transforms their colour, smell and flavour.
Light roasts often preserve more of the bean’s original fruity or floral characteristics. Medium roasts usually provide a balanced taste, while dark roasts produce stronger, smokier and more bitter flavours.
Grinding the Coffee
The roasted beans are ground before brewing. The correct grind size depends on the brewing method.
Espresso requires a fine grind, while a French press uses a coarse grind. Filter coffee usually needs a medium grind.
Using the wrong grind size may cause coffee to taste too weak, too bitter or poorly balanced.
Brewing the Coffee
Coffee can be brewed using several methods, including:
- Espresso machines
- French presses
- Pour-over brewers
- Filter coffee machines
- Moka pots
- Cold-brew systems
Each method extracts flavour differently. Water temperature, brewing time, grind size and the coffee-to-water ratio all influence the final taste.
The process of how coffee is made involves farming, harvesting, processing, roasting, grinding and brewing. Every stage contributes to the aroma, strength and flavour of the finished drink.