Coffee Basics: Caffeine, Processing & Bean Types Explained

If you've ever wondered how much caffeine is really in your cup, why some coffees taste earthier than others, or what 'peaberry' means on a bag of beans, this guide covers the essential facts every coffee drinker should know. From natural processing methods to bean classification, we break down the core concepts that shape your daily brew.

Quick answer: A 190ml cup of tea contains around 50mg of caffeine—less than a third of the 75mg typically found in the same amount of coffee. Daily caffeine intake averages 3.98mg per kilogram of body weight, meaning a 60kg person consumes roughly 239mg daily.

What Is Caffeine?

Caffeine is a methylxanthine compound found naturally in over 100 plants, including coffee, cola nuts, and tea leaves. It’s also added to energy drinks and cold/flu medications. Both coffee and tea contain theophylline, another xanthine with milder effects than caffeine. The exact caffeine content varies by product type, preparation method, and serving size.

The average person consumes 3.98mg of caffeine per kilogram of body weight daily. For example, a 60kg individual takes in approximately 239mg of caffeine per day.

Monsoon (Rainy Season) Coffee

Monsoon coffee, also known as Malabar coffee, is a unique Indian specialty processed through controlled exposure to monsoon winds. Beans are stored in open warehouses during the rainy season, allowing humid air to circulate and swell the beans to double their original size. This 12–16 month process reduces acidity and enhances body, resulting in a mellow, earthy profile with notes of roasted peanuts, caramel, and tobacco. Imperfectly expanded beans are removed before export.

Shade-Grown (Bird-Friendly) Coffee

Shade-grown coffee develops under the canopy of native trees, primarily in Central America, South America, Africa, and parts of Asia. These shaded farms provide habitat for migratory birds, earning the 'bird-friendly' label. Compared to sun-grown coffee, shaded beans often exhibit better environmental resilience and more complex flavors, particularly in Central American origins.

What Is Peaberry Coffee?

Peaberry beans (also called caracol) are small, round single seeds that form inside coffee cherries instead of the usual two flat beans. These rare beans are separated and sold separately, commanding premium prices—especially in Japan. They typically display brighter acidity and more intense aromatic profiles compared to regular beans from the same plant.

Wet Processing Method

Wet processing removes the coffee fruit's pulp while the beans are still moist. Most high-quality coffees use this method to enhance acidity. Traditional wet processing involves fermenting the beans to loosen the sticky mucilage, which is then washed away. Modern techniques use machines to remove the pulp. The beans are dried with a protective parchment layer, which is later removed before roasting.

Hard vs Soft Beans

Hard beans are grown at higher altitudes (1,000–2,000 meters) where cooler temperatures slow ripening, creating denser, less porous beans with higher acidity and more pronounced flavors. Soft beans, grown at lower elevations, ripen faster and are generally less dense. This distinction is commonly used in Central American coffee grading systems.

Chicory Coffee (Coffee Substitute)

Chicory, a perennial plant from Europe, was historically roasted and used as a coffee substitute during shortages. Its roasted root produces a strong, bitter flavor with more roasted notes than coffee but no caffeine. Blends with up to 30% chicory are common. Other substitutes include roasted acorns, potatoes, and local grains.

Frequently Asked Questions

How much caffeine is in tea compared to coffee?

A 190ml cup of tea contains around 50mg of caffeine, which is less than a third of the 75mg typically found in the same amount of coffee.

What is monsoon coffee and how is it made?

Monsoon coffee is Indian coffee exposed to humid monsoon winds in open warehouses for 12–16 months. The process swells the beans to double their size, reduces acidity, and develops earthy flavors like roasted peanuts and tobacco.

Why are shade-grown beans considered better?

Shade-grown beans develop under tree canopies, which protects them and supports bird habitats. These beans often have better environmental resilience and more complex flavors, especially in Central American regions.

What makes peaberry beans different?

Peaberry beans are single, round seeds that form instead of the usual two flat beans. They’re separated and sold separately, often displaying brighter acidity and more intense aromas, particularly in Japanese markets.

What’s the difference between wet and natural coffee processing?

Wet processing removes the coffee fruit’s pulp while the beans are moist, enhancing acidity. Natural (dry) processing dries the whole cherry, often resulting in sweeter, fruitier profiles but with more fermentation variables.

How do altitude and bean hardness relate?

Hard beans grown at higher altitudes (1,000–2,000m) are denser with higher acidity due to slower ripening. Soft beans from lower altitudes ripen faster and are less dense, affecting flavor development.

Recommended FrontStreet Beans for Coffee Basics

Explore FrontStreet Coffee’s Ethiopia Humbera for bright, complex acidity akin to high-altitude hard beans, or Yirgacheffe for floral, tea-like profiles highlighting shade-grown characteristics. For a classic washed process example, try the Brazil Queen Manor—clean and balanced, demonstrating wet processing’s clarity. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.