Tea Types Explained: White, Green, Oolong, Black, and Pu-erh

All tea comes from a single plant species, Camellia sinensis, native to East and South Asia. The thousands of distinct teas that fill specialty shops are all variations on what is done to the leaves after picking. The same farm can produce six different categories of tea from the same harvest depending on the processing chosen, and the differences between those categories are so large that a person who likes one type may dislike another entirely.

This guide covers the five major true tea types, plus a brief note on yellow tea, with practical detail on flavor, caffeine, brewing, and which suits which drinker. Herbal infusions like chamomile, peppermint, and rooibos are technically not tea because they do not come from Camellia sinensis. They are covered separately in herbal-infusion guides.

The processing variable: oxidation

The single most important variable in tea processing is oxidation, sometimes informally called fermentation. After picking, the cell walls of the tea leaf can be ruptured to expose the enzymes inside, which then react with oxygen in the air. The longer this reaction is allowed to proceed, the more the leaf darkens, the more the flavor develops, and the more the caffeine content tends to rise.

Tea processors control oxidation by deciding when to apply heat (which deactivates the enzymes and stops oxidation) and how much to bruise or roll the leaves before that heat is applied. The major categories are defined by their oxidation level:

• White tea: 0 to 5 percent oxidation. Minimal processing.
• Yellow tea: 0 to 5 percent oxidation, but with an extra “smothering” step that produces a yellow tint.
• Green tea: 0 to 5 percent oxidation. Heat applied very early.
• Oolong tea: 20 to 80 percent oxidation. Wide range within the category.
• Black tea: 90 to 100 percent oxidation. Fully oxidized.
• Pu-erh tea: green or black tea base, then post-fermented with microbes for months to years.

White tea: delicate, sweet, minimal processing

White tea is made from young leaf buds or very young leaves, picked early in the season. The buds are simply withered (slow air drying) and then dried fully. No rolling, no oxidation step, no firing.

The flavor profile is subtle. Notes of honey, melon, almond, fresh hay, white flowers. The body is light, the finish clean, the bitterness very low. Some find white tea so subtle that it tastes like flavored water; others find the delicacy is the entire appeal.

Caffeine content varies. Silver Needle (made only from buds) is moderately high in caffeine because young buds concentrate the alkaloid. White Peony (made from buds and young leaves) is lower. As a rough average, 15 to 30 mg per 8 oz cup.

Brewing: 160 to 175 F water, 4 to 5 minutes for a first steep. Multiple infusions are common; a quality white tea can give 3 or 4 good steeps from the same leaves.

Best matched with: meditative slow-drinking moments. White tea does not match strong flavors well and works better as a standalone drink than as a pairing for food or sweets.

Green tea: vegetal, bright, low oxidation

Green tea is processed quickly after picking. The leaves are heated almost immediately (by steaming in the Japanese tradition or by pan-firing in the Chinese tradition) to deactivate the oxidation enzymes. The leaves then keep their green color and the fresh vegetal character.

The flavor profile depends heavily on the processing tradition:

• Japanese steamed green teas (sencha, gyokuro, matcha) have a marine, umami, grassy, sometimes seaweed-like character.
• Chinese pan-fired green teas (Longjing, Bi Luo Chun, gunpowder) have a toasty, nutty, chestnut character with brighter vegetal notes.

The Japanese teas tend slightly higher in L-theanine, the amino acid that contributes both the umami and the calming effect green tea is famous for. The Chinese teas tend more rounded and gentler on the palate.

Caffeine content is moderate, 20 to 45 mg per 8 oz cup, with matcha higher because the entire leaf is consumed as a powder.

Brewing: 160 to 175 F water for most green teas, 175 to 185 F for some hardier Chinese greens. Steeping time 1 to 3 minutes, depending on the leaf and the desired strength. Over-steeping or over-hot water produces bitter astringent green tea.

Best matched with: light meals, sushi and Japanese food (with Japanese greens), light sweets (with Chinese greens).

Oolong tea: the wide spectrum

Oolong is the most diverse tea category. The oxidation range from 20 percent (lightly oxidized greens) to 80 percent (nearly black) means the flavor profile spans from green tea adjacent to black tea adjacent.

Three main styles:

Light oolong (Taiwanese high mountain teas, Tieguanyin from Anxi). Low oxidation, often rolled into pearls. Flavor notes: orchid, gardenia, butter, fresh greens, sometimes mineral. Light body, sweet finish.

Medium oolong (Da Hong Pao, Wuyi rock teas). Medium oxidation, often charcoal roasted after rolling. Flavor notes: roasted nuts, dried fruits, baking spices, cocoa, mineral character from rocky soil.

Dark oolong (Eastern Beauty / Dong Fang Mei Ren, some traditional Tieguanyins). Heavy oxidation. Flavor notes: honey, ripe stone fruit, cinnamon, dried apricot.

Caffeine content is moderate, 20 to 50 mg per 8 oz cup.

Brewing: 180 to 195 F water, 2 to 4 minutes for the first steep. Multiple infusions are core to oolong tradition; quality oolong can yield 5 to 8 steeps from the same leaves with the flavor evolving across the session.

Best matched with: gongfu-style slow brewing (small teapot, many short steeps). Pair with savory dim sum, dark chocolate, dried fruit.

Black tea: bold, full, fully oxidized

Black tea (called red tea in China) is fully oxidized. The leaves are rolled to break the cell walls, then exposed to oxygen for hours, which turns them dark brown and develops the malty, fruity, sometimes wine-like notes that define the category.

Regional styles:

• Indian black teas (Assam, Darjeeling, Nilgiri). Assam is malty and full-bodied, the classic breakfast tea base. Darjeeling is brighter, more floral, sometimes called the “champagne of teas”. Nilgiri is bright and clean.
• Chinese black teas (Keemun, Lapsang Souchong, Yunnan Dianhong). Keemun is balanced with cocoa notes. Lapsang Souchong is smoke-dried over pine wood, producing the famous campfire flavor. Yunnan Dianhong is rich with notes of sweet potato and honey.
• Sri Lankan black tea (Ceylon). Bright, citrusy, slightly woody. The backbone of many iced tea blends.

Caffeine content is the highest among teas, 40 to 70 mg per 8 oz cup.

Brewing: 200 to 212 F water, 3 to 5 minutes. Black tea is the most forgiving of brewing variables; slight over-steeping produces stronger flavor rather than off-flavors.

Best matched with: breakfast foods, heavy or sweet desserts, food pairings that need a strong drink to cut through richness. The default tea for milk and sugar additions.

Pu-erh tea: aged, earthy, fermented

Pu-erh is a distinct category from China’s Yunnan province. After initial green or black tea processing, the leaves are subjected to post-fermentation by microbial cultures, then aged for months to decades. Two main types:

• Sheng (raw) pu-erh: aged naturally over years to decades. Flavor evolves from bitter and astringent (young) to mellow and complex (aged 10+ years).
• Shou (ripe) pu-erh: post-fermented in piles for 45 to 60 days, which simulates the effect of decades of aging. Flavor is earthy, smooth, sometimes mushroomy, ready to drink immediately.

The flavor of aged pu-erh is unlike any other tea: earthy, woody, sometimes barnyard or mushroom-like, with a deep sweetness. The category is acquired but rewarding for drinkers who explore it.

Caffeine content is moderate to high, 30 to 70 mg per 8 oz cup.

Brewing: 200 to 212 F water. Rinse the leaves briefly (10 to 15 seconds) and discard the rinse before the first proper steep. Then steep 1 to 3 minutes for first infusion, slightly longer for subsequent infusions. Pu-erh can give 8 to 12 steeps from the same leaves in a gongfu session.

Best matched with: rich food (Cantonese dim sum is the classic pairing), digestifs after heavy meals.

Finding your starting point

For a tea drinker exploring beyond bagged supermarket black tea: try a quality loose-leaf green (a Japanese sencha or a Chinese Longjing), a medium oolong (Da Hong Pao or a roasted Tieguanyin), and an aged black tea (a Keemun or a Yunnan Dianhong). Brew each one to its proper temperature and steep time. The differences will be obvious and the preference will sort itself out.

White tea and pu-erh both reward more patience as later explorations. They are not less interesting than the others, just more demanding of attention to appreciate.

The world of tea is genuinely as wide as the world of wine, with similar regional, varietal, and processing complexity. Two or three months of casual exploration covers more ground than most drinkers ever bother to discover.

Frequently asked questions