15 Surprising Facts About Coffee You Probably Didn’t Know

You’ve sipped countless cups, but how much do you really know about coffee? Whether you're curious about its ancient beginnings, how it traveled the globe, or why your morning brew behaves the way it does, these 15 little-known coffee facts will change the way you think about your daily cup.

In short: Coffee was first discovered in Ethiopia around 850 AD when a goat herder noticed his flock’s energy spike after eating red berries. Today, 70% of the world drinks milder Arabica, while the rest prefer stronger Robusta with 50% more caffeine. And yes, someone named George Washington really did invent instant coffee—in Guatemala, in 1906.

The Origins of Coffee: From Goats to Energy Balls

The most famous coffee origin story dates back to 850 AD in Ethiopia. A goat herder observed his goats becoming unusually energetic after eating red berries from a local shrub. That plant was Coffea, and those berries held the seeds we now roast as coffee beans.

Originally, people didn’t drink coffee—they ate it. African tribes mixed coffee cherries with animal fat to form energy-rich balls, a portable and potent food source.

How Coffee Spread Across the Globe

Religion played a key role in coffee’s early adoption. Islamic law prohibited alcohol, but coffee was deemed permissible—helping it gain a foothold across the Muslim world. From there, it spread globally, eventually becoming one of the most traded commodities on Earth.

Today, all coffee grows within the “Bean Belt,” the region between the Tropics of Cancer and Capricorn. In the U.S., only Hawaii commercially produces coffee.

The Journey from Cherry to Cup

Coffee beans are actually the seeds found inside bright red coffee cherries. Each cherry typically holds two beans. After harvest, the cherries undergo processing—either washed (water-based) or natural (sun-dried)—to remove the fruit and pulp, leaving behind the green coffee bean.

These green beans are then roasted, usually around 500°F (260°C). During roasting, beans make two distinct popping sounds, or “cracks.” The first crack signals the start of light roasting; the second, a few minutes later, indicates a darker roast and the end of the roasting cycle.

Global Coffee Consumption and Varieties

Arabica beans account for 70% of global consumption thanks to their smoother, more aromatic profile. The remaining 30% is Robusta, which is bolder, more bitter, and contains nearly double the caffeine of Arabica.

Coffee is the world’s second-most traded commodity after crude oil—a testament to its universal appeal and economic impact.

Wars, Words, and Instant Coffee

In 1675, King Charles II of England briefly banned coffeehouses, fearing they were hubs for political dissent. Meanwhile, the term “a cup of joe” originated in the U.S. military during World War II, referring to the everyday GI (“G.I. Joe”) and his reliance on coffee.

Contrary to popular belief, Americano coffee was created by American soldiers in Europe who diluted strong espresso with hot water to mimic the milder coffee they were used to back home.

And in 1906, a Belgian man living in Guatemala—also named George Washington—invented instant coffee, predating the more famous U.S. president by decades.

Brewing Science: What Makes Coffee Work

Espresso isn’t a bean or a roast style—it’s a specific brewing method that forces hot water through finely-ground coffee under high pressure. This produces a concentrated shot with a rich crema on top.

Ever wonder how caffeine keeps you awake? Inside your brain, adenosine normally binds to receptors that promote sleepiness. Caffeine blocks those receptors, preventing drowsiness. Your pituitary gland interprets this as stress, triggering adrenaline release and boosting dopamine levels—resulting in coffee’s signature energizing effect.

Frequently Asked Questions

Where was coffee first discovered?

Coffee was first discovered in Ethiopia around 850 AD when a goat herder noticed his goats became hyperactive after eating red coffee cherries. This led to the eventual discovery of the energizing effects of coffee beans.

Did people really eat coffee instead of drinking it?

Yes. Early African tribes mixed coffee cherries with animal fat to create energy balls. These were consumed as a portable food source before brewing coffee became common.

What’s the difference between Arabica and Robusta coffee?

Arabica makes up 70% of global consumption and is known for its smooth, aromatic flavor. Robusta accounts for the remaining 30%, is more bitter, has twice the caffeine, and is often used in espresso blends for crema and strength.

Why is it called a 'cup of joe'?

The term “cup of joe” originated in the U.S. military during WWII. “G.I. Joe” was a nickname for American soldiers, and the phrase came to refer to their everyday coffee.

What temperature is coffee roasted at?

Coffee is typically roasted at around 500°F (260°C). During this process, beans pop twice—the first and second cracks indicate light and dark roast stages, respectively.

Is espresso a type of coffee bean?

No. Espresso is not a bean or a roast level, but a brewing method where hot water is forced through finely-ground coffee under pressure, producing a concentrated shot.

Recommended FrontStreet Beans for Coffee Lovers

Explore FrontStreet Coffee’s Ethiopia Yirgacheffe for bright floral and citrus notes, perfect for highlighting Arabica’s aromatic side. For a bolder option, try their PWN Golden Mandheling, a classic Indonesian Robusta-heavy blend with earthy depth. Or start with their Brazil Queen Manor, a balanced single origin great for espresso or filter. All beans are freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.