The Complete Tea Guide — From Green to Pu-erh, with Everything in Between
Welcome to the World of Tea
If coffee is stimulation, tea is the balance of calm and focus.
All true tea (Camellia sinensis) comes from the same plant. The difference between green tea, black tea, and everything in between is determined entirely by how the leaves are processed — oxidation level, firing method, and drying technique transform the same leaf into radically different flavors.
Tea is the second most consumed beverage in the world, after water.
The Six Tea Categories
| Type | Oxidation Level | Flavor Profile | Key Origins |
|---|---|---|---|
| Green | 0% | Fresh, grassy, vegetal | China, Japan, Korea |
| White | Minimal | Delicate, sweet | Fujian, China |
| Yellow | Light | Smooth, mellow | China |
| Oolong | 15–85% | Floral to toasty (wide range) | China, Taiwan |
| Black | ~100% | Bold, malty | India, Sri Lanka, China |
| Dark / Pu-erh | Fermented | Earthy, woody, deep | Yunnan, China |
Herbal teas and rooibos: Not made from Camellia sinensis — technically “herbal infusions” rather than true tea.
Green Tea
Japanese Green Tea
| Type | Character | Brewing |
|---|---|---|
| Matcha | Powdered, rich, umami | 70°C (158°F) water; whisk with bamboo chasen |
| Gyokuro | Highest grade; shade-grown 20+ days | 50–60°C (122–140°F), 1–2 min |
| Sencha | The everyday Japanese green tea | 70–80°C (158–176°F), 1–2 min |
| Hojicha | Roasted green tea; low caffeine | 90–100°C (194–212°F) |
| Genmaicha | Green tea blended with popped brown rice; nutty | 80–90°C (176–194°F) |
Chinese Green Tea
- Longjing (Dragon Well): From Hangzhou; flat leaves, chestnut-sweet flavor
- Biluochun: From Jiangsu; spiral-shaped leaves, floral and fruity
- Huangshan Maofeng: From Anhui; delicate and orchid-like
Black Tea
Origin Regions
| Origin | Character | Notable Varieties |
|---|---|---|
| Darjeeling, India | ”The Champagne of teas,” muscatel notes | First Flush (spring harvest) |
| Assam, India | Bold, malty, strong — perfect for milk tea | TGFOP grade |
| Ceylon / Sri Lanka | Balanced, clean — great with lemon | Uva, Dimbula |
| Keemun, China | Floral, aromatic | Classic Chinese black tea |
How to Brew Black Tea
Water temperature: 95–100°C (203–212°F): steep 2–5 minutes, adjusted to taste.
Milk tea: Brew strong, then add warm milk 1:1 — or simmer tea leaves directly with milk (chai style).
Iced tea: Brew double strength, then pour over ice.
Oolong Tea
Oolong’s wide oxidation range gives it the most diverse flavor spectrum of any tea category.
| Variety | Oxidation | Flavor |
|---|---|---|
| High Mountain Oolong (Taiwan) | 20–30% | Floral, creamy |
| Oriental Beauty (Taiwan) | 60–70% | Honey, fruity |
| Da Hong Pao (China) | 60–80% | Roasted, mineral |
| Tie Guan Yin (China) | 15–30% | Orchid, green |
Brewing: 90°C (194°F), 2–3 minutes. Oolong is excellent for multiple infusions — re-steep up to 5–7 times, with each round revealing a different facet of flavor.
Pu-erh (Dark Tea)
A fermented tea with a distinctive earthy, woody flavor profile.
Raw Pu-erh (Sheng): Naturally aged after initial processing. Can be aged for decades — premium aged raw pu-erh is collectible and sometimes investment-grade. Ripe Pu-erh (Shou): Accelerated fermentation produces a smoother, more immediately approachable earthy flavor.
Health associations: Gut health support, cholesterol reduction, weight management (research ongoing and preliminary).
Health Benefits of Tea
Catechins (EGCG)
The primary antioxidants in green tea.
- Antioxidant activity estimated at 25–100× that of Vitamin E
- Cancer cell inhibition (preclinical research)
- LDL cholesterol reduction
- Metabolic support and weight management
L-Theanine
An amino acid found almost exclusively in tea — responsible for tea’s characteristic calm focus.
Caffeine + L-theanine = the alertness of caffeine plus a smoothing, anxiety-reducing effect → often described as “clean energy.”
Brain wave research: L-theanine increases alpha wave activity (associated with a relaxed, alert, meditative state).
Caffeine by Beverage (per 8 oz / 240 ml)
| Beverage | Caffeine |
|---|---|
| Drip coffee | ~95 mg |
| Espresso | ~63 mg |
| Black tea | ~47 mg |
| Green tea | ~28 mg |
| White tea | ~15 mg |
| Hojicha | ~7 mg |
Brewing Fundamentals
| Tea Type | Water Temperature | Steep Time |
|---|---|---|
| Green | 70–80°C (158–176°F) | 1–2 min |
| White | 80–85°C (176–185°F) | 2–3 min |
| Oolong | 90–95°C (194–203°F) | 2–3 min |
| Black | 95–100°C (203–212°F) | 3–5 min |
| Dark / Pu-erh | 100°C / boiling | 3–5 min |
Over-steeping: Causes bitterness from excess tannin extraction. Time it.
Water quality: Soft, filtered water (low TDS) lets the tea’s natural flavors come through more clearly. Tap water varies widely; a simple filtered pitcher makes a noticeable difference.
Choosing Teaware
| Use Case | Recommendation |
|---|---|
| Everyday green tea | Ceramic or porcelain mug (8–12 oz) |
| Chinese oolong / dark tea | Yixing clay teapot (gong fu style, 4–6 oz) |
| Black tea / English style | Bone china cup and saucer |
| Matcha | Matcha bowl (chawan) + bamboo whisk (chasen) |
Yixing clay teapots: Made from the mineral-rich purple clay of Yixing, Jiangsu. With use, the clay absorbs the tea’s essence, gradually enhancing the flavor of future brews. Traditionally, one Yixing pot is dedicated to one type of tea.
Building a Daily Tea Ritual
Morning: Green or black tea (caffeine to wake up) Early afternoon: Oolong (sustained focus + L-theanine) Evening: Hojicha, chamomile, or mint (low/no caffeine)
Tea isn’t about speed — it’s a brief pause. The act of heating water, measuring leaves, watching them unfurl, and waiting for the steep is its own form of mindfulness. One deliberate cup a day is already a practice.
OIYO Editorial
Content Editor지식 인큐베이터이자 전문 콘텐츠 크리에이터. 경영, 경제, 법률 및 실생활에 유용한 실무/자격증 중심의 깊이 있는 정보를 연구하고 공유합니다.