What Is Coffee? The Basics Every Coffee Drinker Should Know

Ever wonder where your morning coffee actually comes from? Before it’s ground, brewed, and poured into your cup, coffee begins its life as a fruit on a tree—far from your local café. If you’ve ever asked, ‘What is coffee?’ or wanted to understand the journey from plant to pour-over, this guide covers the essentials.

Coffee is the seed of a red fruit grown on tropical evergreen trees, mainly in high-altitude regions along a narrow band near the equator. The coffee bean is technically the pit inside that bright red berry, harvested, processed, and roasted to become the coffee we drink. Understanding this process is the first step to appreciating your cup.

What Is Coffee?

Coffee comes from the fruit of plants in the Rubiaceae (madder) family. These Coffea plants are evergreen shrubs or small trees that can grow up to 20 feet tall but are usually pruned to around 8–10 feet for easier harvesting. Native to mountainous regions at about 6,000 feet elevation, they thrive in a narrow subtropical zone along the equator. The actual coffee "bean" is the seed found inside the plant’s ripe fruit.

How Coffee Is Harvested

Coffee cherries do not all ripen at once. Because of uneven ripening, almost all quality coffee is picked by hand, one cherry at a time. This labor-intensive method ensures only ripe fruit is harvested. Machines are used only for low-grade, bulk harvests where ripeness isn’t critical.

How Coffee Is Processed

Right after picking, coffee cherries must be processed to remove the fruit and dry the seeds. There are two main methods:

• Natural (Dry) Process: Cherries are spread out in the sun for 12–15 days to dry. Once dry, the outer fruit layers are removed to reveal the green coffee bean. This method is cheaper but can result in uneven drying, fermentation issues, and off-flavors if it rains. The beans may be less clean and have more earthy or fermented notes.
• Washed (Wet) Process: The cherries are first soaked to remove the skin and pulp, then the beans are fermented briefly before being washed and dried for 20–24 hours. This results in cleaner, brighter-tasting beans with fewer defects. The beans are dried until they reach the “parchment” stage—a protective husk around the green bean. Before export, this parchment is removed, and the beans are polished and graded. Washed coffee is more expensive to produce but yields higher-quality, more consistent beans.

The Three Main Coffee Varieties

There are three primary species of coffee cultivated globally:

1. Arabica

• Origin: Ethiopia
• Global Production: 70–80%
• Growing Altitude: 500m–1000m+ (higher is better)
• Climate: Does not tolerate extreme heat or cold
• Rainfall: Requires moderate, consistent rainfall
• Tree Height: ~5m
• Bean Shape: Elliptical and flat
• Caffeine Content: 1.1%–1.7%
• Creama: Moderate
• Flavor: Generally aromatic, with balanced acidity; considered superior in cup quality
• Main Regions: Brazil, Colombia, Ethiopia, Kenya, Yemen, Honduras, Guatemala, and many more across Central and South America, Africa, and Asia

2. Robusta

• Origin: Congo, Africa
• Global Production: 20–30%
• Growing Altitude: Below 500m
• Climate: Tolerates heat well
• Rainfall: Adaptable to varied conditions
• Tree Height: ~12m
• Bean Shape: Short, round, oval
• Caffeine Content: 2%–4%
• Creama: Higher
• Flavor: Stronger bitterness, harsher taste, often less aromatic; higher caffeine makes it more resistant to pests
• Main Uses: Often used in instant coffee and lower-cost blends
• Main Regions: Uganda, Ivory Coast, Vietnam, Indonesia (Java), India, and the Philippines

3. Liberica

• Origin: Liberia, Africa
• Global Production: Less than 5%
• Growing Altitude: Below 200m, mostly flatlands
• Climate: Tolerant of both heat and cold extremes
• Rainfall: Hardy and adaptable
• Tree Height: ~18m
• Bean Shape: Pointed, diamond-like
• Caffeine Content: (Not specified in source)
• Creama: (Not specified in source)
• Flavor: Strong bitterness, less aroma; unique but not widely favored
• Main Regions: Liberia, Suriname, Guyana, Indonesia, and parts of the Philippines and Angola

Coffee and Caffeine

Caffeine is the main compound behind coffee’s bitter taste and its stimulating effects. Found not only in coffee but also in tea, chocolate, and cola, caffeine affects the body for roughly 2–3 hours. In moderation, it can boost alertness and improve blood circulation.

Frequently Asked Questions

What is a coffee bean?

A coffee bean is the seed inside the fruit (cherry) of the Coffea plant. The fruit is red when ripe, and the bean is the pit nestled inside. This seed is what gets roasted and ground to make brewed coffee.

What are the main types of coffee plants?

The three main coffee species are Arabica, Robusta, and Liberica. Arabica accounts for 70–80% of global production and is known for high quality. Robusta makes up 20–30%, is more bitter, and higher in caffeine. Liberica is rare, under 5% of production, with a strong, unique flavor profile.

Which coffee processing method is better?

Washed (wet) process coffee is generally considered better for flavor, producing cleaner, brighter cups with fewer defects. Natural (dry) process is cheaper and often used in regions with limited water, but can result in more inconsistent flavors if not carefully managed.

Where does most of the world’s coffee come from?

The majority of coffee comes from tropical countries located near the equator, especially in South and Central America, East Africa, and Southeast Asia. Brazil, Vietnam, and Colombia are the top producers worldwide.

Why are some coffees more expensive than others?

Higher prices are often due to careful cultivation at high altitudes, labor-intensive harvesting (like hand-picking only ripe cherries), and premium processing methods such as washed processing. Arabica beans are typically more expensive than Robusta due to their cup quality and growing conditions.

Is caffeine the only active compound in coffee?

No, while caffeine is the most well-known, coffee also contains hundreds of other compounds including acids, oils, and antioxidants that contribute to its aroma, flavor, and health effects. But caffeine is the main driver of its stimulating properties.

Recommended FrontStreet Coffee Beans for Coffee Basics

Explore the fundamentals with FrontStreet Coffee’s Ethiopia Yirgacheffe, a classic high-altitude Arabica known for floral and citrus notes, and Colombia Huila, a balanced, medium-bodied washed coffee with caramel and nutty tones. For contrast, try their Brazil Yellow Bourbon, a smooth, low-acid Arabica with chocolate and nut flavors. All three highlight the diversity within Arabica, the world’s dominant coffee species. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.