What Is Coffee? Key Terms Every Coffee Drinker Should Know

Ever wondered what really makes your cup of coffee taste or function the way it does? Whether you’re curious about caffeine levels, what 'monsooned' coffee means, or why some beans grow in the shade, this guide unpacks the key coffee concepts you’ve heard about but never fully understood.

In short: Caffeine is found in over 100 plants, including coffee and tea. An average 60 kg person consumes about 239 mg daily—that’s roughly 3.98 mg per kg of body weight. Monsooned coffee is stored in humid warehouses for 12–16 months to reduce acidity and boost body. Shade-grown coffee develops more complex flavors under tree canopies. Peaberry beans are rare, round, and prized in Japan. Wet processing enhances acidity. Hard beans grow at high altitudes and often taste better. Chicory coffee is a caffeine-free substitute. Aged coffee mellows in flavor over time. Salt coffee is said to aid digestion and metabolism.

What Is Caffeine?

Caffeine is a methylxanthine compound found naturally in the leaves, roots, and fruits of over 100 plants. Common sources include coffee, kola nuts, and tea. It’s also added to energy drinks and cold or flu medications. Alongside caffeine, tea and coffee contain theophylline, another xanthine with weaker effects.

The caffeine content depends on the product. For example, 190 ml of tea contains around 50 mg of caffeine—less than one-third of the 75 mg typically found in the same amount of coffee. On average, people consume about 3.98 mg of caffeine per kilogram of body weight per day. That works out to approximately 239 mg for someone weighing 60 kg.

What Is Monsooned Coffee?

Monsooned coffee, also known as Monsoon Malabar, is a unique coffee from southern India processed through a traditional drying method. The beans are stored in open warehouses and deliberately exposed to seasonal monsoon winds. This exposure causes the beans to swell, lose acidity, and develop a heavier body.

The process is labor-intensive: beans are spread out and manually raked or turned to ensure even absorption of moisture. It takes 12 to 16 months, during which the beans nearly double in size and turn a dull golden color. Incomplete swelling beans are removed. The resulting beans have a mild aroma but produce a rich flavor reminiscent of roasted peanuts, caramel, and tobacco when brewed.

What Is Shade-Grown Coffee (or Bird-Friendly Coffee)?

Shade-grown coffee is cultivated under the canopy of taller native trees, which protect the coffee plants and provide habitats for migratory birds—earning it the nickname “bird-friendly coffee.” Traditional Arabica varieties in countries like Mexico, Central America, Colombia, Peru, Venezuela, India, Indonesia, and parts of Africa are commonly grown this way.

These shaded environments support biodiversity and often result in more resilient and flavorful beans. Many of the best-tasting Central American coffees are grown in shade, which mimics the coffee plant’s natural habitat and improves cup quality.

What Is Bourbon Coffee?

Bourbon is a natural mutation of the Arabica species that originated on Île Bourbon, now called Réunion Island. It has been widely cultivated and exported to Latin America and Africa. Some of the finest Latin American coffees are derived from Bourbon trees, which thrive at elevations between 1,000 and 2,000 meters.

Bourbon is known for its balanced cup profile and is considered one of the key varieties in the development of many modern Arabica cultivars.

What Is a Peaberry Coffee Bean?

Peaberry beans, also called caracolillo, are small, round beans that form singly inside the coffee cherry, instead of the usual two flat beans. They occur when only one seed develops in the coffee fruit, usually in the center. These beans are often separated and sold as a distinct grade.

Popular in Japan, peaberry beans are prized for their brighter acidity, intense aromatics, and unique flavor. They come from the same plants as regular beans but are selected for their enhanced cup characteristics.

What Is Wet Processing?

Wet processing, or washed processing, removes the coffee fruit’s pulp while the beans are still moist. Most high-quality coffees are processed this way to enhance their acidity and clarity. In traditional methods, the coffee cherry skin is removed, and the sticky mucilage is broken down via fermentation before being washed away. Modern methods may use machines to remove the mucilage directly.

After washing, the beans are dried with a layer of parchment skin intact. This “parchment coffee” is traded and later hulled before roasting. Wet processing is favored for producing bright, high-acid profiles in specialty coffee.

What Are Hard and Soft Beans?

Hard beans are grown at higher altitudes where cooler temperatures slow ripening, resulting in denser, less porous beans. These beans are typically associated with higher acidity and more complex flavors. In contrast, soft beans are grown at lower altitudes with warmer conditions, leading to softer, less dense beans.

This distinction is especially used in Central American coffee grading, where altitude directly influences bean hardness and cup quality.

What Is Chicory Coffee?

Chicory is a perennial plant native to Europe, introduced to North America in the 1700s. While its leaves can be eaten, its roots are roasted, ground, and used as a coffee substitute. Historically, when coffee was scarce or expensive, roasted chicory was a common replacement.

Chicory has no caffeine but offers a strong roasted flavor. It’s often blended with coffee—up to 30% chicory—to reduce caffeine content. Other substitutes include roasted acorns and potatoes.

What Is Aged Coffee?

Historically, aged coffee resulted from long sea voyages in hot, humid cargo holds, altering the beans’ flavor profile. Today, some coffees are intentionally stored for years to lower acidity and increase body. Indonesian coffees, such as those affected by monsoon humidity, are sometimes aged deliberately to develop deeper flavors.

Stored properly, aged coffee can last longer than freshly harvested or recently milled beans, developing unique taste characteristics over time.

What Is Salt Coffee?

Salt coffee involves adding 1/4 to 1/6 of a teaspoon of natural salt per cup, along with compounds that support gut health. Advocates claim it aids digestion, improves enzyme efficiency, enhances fat metabolism, and promotes skin health. The salt balances flavors and may mitigate bitterness.

Japanese doctor Hiromi Shinya suggests that maintaining a healthy gut microbiome is vital for overall wellness, and salt coffee is one way some believe this balance can be supported.

Recommended FrontStreet Beans for Exploring Coffee Types

Explore unique coffee profiles with FrontStreet Coffee’s Lintong Mandheling, a medium-dark roast featuring herbal, spicy, and caramelized notes like toasted bread and burnt sugar. For lighter options, try the 2013 Yunnan Typica, a balanced cup with nut, chocolate, and black tea notes ideal for new tasters. Both highlight different processing and growing traditions, from Indonesia’s earthy depth to Yunnan’s bright clarity. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.