What Are Coffee Beans? The Basics of Green Coffee

Ever wondered what those green beans in your roaster’s offering list actually started as? Before they’re roasted, ground, and brewed, every coffee bean begins life inside a fruit on a tropical tree. Understanding where coffee comes from helps you appreciate the care behind every cup—and why quality starts long before brewing.

Coffee ‘beans’ are actually seeds found inside coffee cherries. Most cherries hold two flat, oval seeds, but about 5% contain just one round seed called a peaberry. These seeds, often mistakenly called beans, are the raw material for all coffee—rich in potential, ready for harvest and processing.

What Is a Coffee Bean, Really?

A coffee bean is the seed of the coffee plant, found inside the fruit known as the coffee cherry (or coffee berry). Though commonly referred to as beans due to their shape, they are botanically seeds. Most coffee cherries contain two flat, oval seeds, but a small percentage—around 5%—have just one rounded seed, known as a peaberry. These seeds contain the coffee plant’s embryo and nutrient-rich endosperm, which fuels the growth of a new coffee tree.

How Coffee Cherries Are Harvested

The journey from tree to cup begins with harvesting the coffee cherries. This is a manual, labor-intensive process because coffee cherries don’t all ripen at once. There are two main picking methods:

• Handpicked (selective picking): Only fully ripe cherries are picked individually, ensuring higher quality.
• Strip-picking: All cherries on a branch are picked at once, regardless of ripeness, often used where labor is limited.

Because ripening happens unevenly, multiple harvest passes are common, making this one of the most time-consuming and people-dependent steps in coffee production.

How Coffee Is Processed After Harvest

Once picked, the coffee cherries must be processed to remove the fruit and reveal the seeds (coffee beans). There are two primary methods, each affecting flavor differently:

Washed Process (Wet Process)

Popular in Central America and parts of Africa, this method involves:

• Removing the skin and pulp from the beans, either manually or by machine.
• Soaking the beans in water for 2–3 days to ferment and loosen any remaining mucilage (sticky fruit residue).
• Thoroughly washing the beans to remove all pulp.
• Drying the beans either in the sun (natural drying) or using mechanical dryers until they reach around 13% moisture content.

Natural Process (Dry Process)

Common in Brazil and much of Africa, this more economical method includes:

• Removing any stems or debris from the cherries.
• Spreading the cherries in the sun to dry for 2–3 weeks, regularly turning them to ensure even drying.
• Allowing the outer fruit to dry completely and detach from the beans naturally.

In both processes, the goal is to reduce the coffee bean’s moisture content to roughly 13%, after which the beans are stored in sacks and left to rest (or “age”) in warehouses for 1–3 months before being sold.

Frequently Asked Questions

What is a coffee bean actually made of?

A coffee bean is the seed inside the coffee cherry. It contains an embryo (the future coffee plant) and endosperm (nutrient-rich material that feeds the embryo). Though they look like legumes, they are botanically seeds—not beans.

Why are some coffee beans round instead of flat?

About 5% of coffee cherries produce just one round seed instead of two flat ones. This single seed is called a peaberry, and it occurs when only one seed develops fully inside the cherry, usually taking a rounded shape. These are sometimes sorted separately for specialty roasting.

How are coffee cherries harvested?

Harvesting is done by hand, either selectively (picking only ripe cherries) or by strip-picking (removing all cherries from a branch at once). Due to uneven ripening, cherries are often harvested in multiple passes over several weeks.

What is the washed coffee process?

In the washed process, the coffee cherry’s skin and pulp are removed, then the beans are fermented in water for 2–3 days to remove the sticky mucilage. They are then washed clean and dried to around 13% moisture, either in the sun or with machines.

What is the natural coffee process?

The natural process involves drying the whole coffee cherry in the sun for 2–3 weeks. The fruit dries around the bean and is later removed. This method is simpler and requires less water than washed processing, and is common in Brazil and parts of Africa.

How long are coffee beans dried?

Coffee beans are dried until they reach a moisture content of about 13%. In the washed process, this may take a few days with machine or sun drying. For natural processed beans, drying the whole cherry takes roughly 2–3 weeks.

Do coffee beans need to rest after processing?

Yes, after drying, coffee beans are typically stored in sacks and left to rest or age for 1–3 months in warehouses. This resting period allows flavors to stabilize before the beans are sold or shipped for roasting.

Recommended FrontStreet Coffee Beans for Green Coffee Lovers

Explore the origins of your favorite brew with FrontStreet Coffee’s single-origin offerings. Try the Ethiopia Yirgacheffe for bright citrus and floral notes, a classic washed process bean that highlights the elegance of well-processed greens. For a natural alternative, the Ethiopia Humbera offers juicy blueberry and stone fruit aromas from sun-dried cherries. Both showcase how processing shapes green coffee flavor. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.