What Are Coffee Beans? From Cherry to Roast

Ever wondered where your morning coffee actually comes from? Before it’s ground, brewed, or sipped, every coffee bean begins life as a seed hidden inside a fruit—what we call a coffee cherry. But the journey from tree to cup involves more than just roasting. Understanding how those seeds are grown, picked, and prepared can change how you think about your daily brew.

Coffee beans are the seeds of the coffee cherry, typically found in pairs—though some cherries hold just one, called a peaberry. The two main commercial species are arabica (75–80% global production, 0.8–1.4% caffeine) and robusta (20%, 1.7–4% caffeine). These seeds are the foundation of the global coffee trade, vital to economies in developing countries where exports can make up half of all foreign income.

How Coffee Cherries Become Coffee Seeds

Each coffee cherry usually holds two flat, oval seeds—these are the “beans.” But around 5–10% of cherries produce just one round seed, known as a peaberry. Both types contain a nutrient-rich part called the endosperm, essential for germination. This seed is what we roast and brew, though it starts life far from resembling your favorite single origin.

Harvesting Coffee: Handpicked vs Strip-Picked

Coffee cherries are harvested manually in most producing regions. There are two main methods: handpicked (only fully ripe cherries are selected) and strip-picked (all cherries on a branch are taken at once). Because cherries ripen unevenly, multiple passes through the same trees are often needed—this labor-intensive process can stretch harvesting over weeks or even months.

Two Ways to Process Coffee: Washed and Natural

Once picked, coffee cherries must be processed to remove the fruit and dry the seeds. The most common methods are:

• Washed (Wet) Process: Popular in Central America and parts of Africa. The skin and pulp are removed mechanically or by hand, then the beans soak in water for 2–3 days to break down mucilage. After washing, they’re dried—either in the sun or with machines.
• Natural (Dry) Process: Common in Brazil and much of Africa. After removing debris, cherries are spread in the sun for 2–3 weeks, regularly turned until they dry completely and the seeds detach naturally.

Both methods aim to reduce the moisture content to around 13%, a critical threshold for stable storage and quality preservation.

From Processing to Storage: The Drying and Resting Phase

After drying, the beans—now officially “green coffee”—are bagged and left to rest in warehouses for 1–3 months. This aging period allows flavors to stabilize before the beans are sold to roasters. Proper moisture control and ventilation during this phase are essential to avoid mold or over-drying.

Frequently Asked Questions

What is a coffee bean really?

A coffee bean is the seed inside a coffee cherry, not a true bean. Most cherries contain two flat, oval seeds, but about 5–10% have a single round seed called a peaberry. These seeds are what get roasted and brewed.

What’s the difference between arabica and robusta coffee beans?

Arabica makes up 75–80% of global production and has a caffeine content of 0.8–1.4%, while robusta accounts for around 20% with 1.7–4% caffeine. Arabica is generally more delicate and widely considered higher quality, whereas robusta is hardier and often used in espresso blends for extra crema and bitterness.

How are coffee cherries turned into green coffee beans?

Cherries are either handpicked (selectively) or strip-picked (whole branches). Then they undergo either a washed process (removing skin and soaking to remove mucilage) or a natural process (drying cherries whole in the sun). In both cases, the goal is to dry the seeds to around 13% moisture.

Why do coffee beans need to rest after drying?

After reaching 13% moisture, green coffee beans are stored for 1–3 months to allow chemical changes to stabilize. This resting period helps develop a more balanced flavor profile before roasting and brewing.

Does every coffee cherry produce two beans?

No. Most cherries contain two beans, but around 5–10% have just one round bean, known as a peaberry. These occur when only one seed develops inside the cherry instead of the usual pair.

FrontStreet Coffee Beans for Exploration

Explore the journey from cherry to cup with FrontStreet Coffee’s single origins. The Ethiopia Yirgacheffe offers bright citrus and floral notes, highlighting the qualities of well-processed arabica. For contrast, try the Brazil Natural, a classic natural-process bean with nutty, chocolatey tones showing how sun-dried cherries develop. Both showcase how processing shapes flavor. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.