Everything You Need to Know About Tea, Explained

From the highly caffeinated to the perfect bed time blend.

cup of tea green steaming teas explained thrillist guide list
Zadorozhnyi Viktor/Shutterstock
Zadorozhnyi Viktor/Shutterstock

When I was a kid in Texas, I was pretty sure tea came in two forms: ice cold and loaded with sugar and lemon wedges or hot, vaguely minty and only consumed when sick or battling insomnia. Little did tiny me know that inside this seemingly innocuous beverage lurked thousands of years of history, tradition, culture, industry, and science.

“I could probably spend hours talking to you about the role of tea in history and colonialism, everything from the Boston Tea Party to the Opium Wars,” says Nova Scotia-based Mel Hattie, the certified tea sommelier, writer, and consultant behind the tea-fueled travel blog Mel Had Tea (get it? Say it out loud). “Being such a huge trade product, it's played a really big role in a lot of international relationships. Take Taiwan, for example. For awhile, it was a Dutch colony, and then the Chinese were there and then the Japanese were there. With the Taiwanese oolongs, you can really see the effects and impacts of all three cultures.”

Tea is one complicated beast, a far cry from the dusty Sleepytime and saccharine instant powder of my ignorant American youth. And as such, the wide world of tea can sometimes be tough to navigate, even if you’ve dipped your toes much farther into the aromatic waters that I ever had. Thankfully Hattie, who does this kind of thing for a living, is here to walk us through the basics. Here’s what you need to know, including where tea comes from and a quick cheat sheet of all the different varieties:

dry tea blends teas blend green black rose herbal aromatic
Africa Studio/Shutterstock

Believe it or not, all tea comes from the same exact plant

“I always like to start with the fact that, be it white tea, green tea, black tea, or oolong, it all comes from the Camellia sinensis plant,” says Hattie. “There are two main kinds: the Camellia sinensis sinensis and Camellia sinensis assamica. The Camellia sinensis assamica grows more in India and Sri Lanka, as well as Kenya. The Sinensis sinensis varietal is the kind that you find throughout China, Vietnam, Korea, and Japan.”

Also known as the tea plant (of course), Camellia sinensis is a small evergreen shrub or tree. Its leaves and leaf buds are the parts that eventually wind up in your cup.

...which means herbal tea is not technically tea

Yep, you heard us right. Herbal tea is not really tea in the true sense of the word, as it doesn’t stem from the almighty Camellia sinensis. Instead, it’s usually a blend of leaves, roots, flowers, or bark from any number of edible plants. That’s not to say that steamy mug of soul-hugging Tension Tamer isn’t delicious -- it’s just, you know, not actually tea.

It’s all about oxidation

Even though they originate from the same plant, anybody who’s tasted them knows that green tea, white tea, oolong, and black tea each have their own very distinct characteristics. That’s where oxidation comes in. After the harvester plucks off the leaves or buds, they process the clippings into the dried, steepable little packages we know and love. The amount of oxygen it’s exposed to during this process is what helps to determine the tea’s eventual classification.

“Coffee is a really good analog,” Hattie explains, putting it into more familiar terms. “Green tea, that's kind of your light roast coffee. It’s very lightly steamed, just enough to kind of kill the enzymes and stop the oxidation process. That's actually what we call the ‘kill green’ stage, because it keeps the leaf green. From there it's rolled and heated until you have about 7% moisture content, then it's packed and shipped.”

“Black tea, that's more like your dark roast coffee,” she continues. “It's been dried for a really long time, it’s been withered, it's been rolled. It's gone through a much more intense production process. The longer you do it, the more times you roll it before it's fired, that's going to determine whether it becomes oolong tea, which is less oxidized, or black tea.”

tea green black herbal teas cup saucer brewed brew boiling water hot
virtu studio/Shutterstock

White tea is the youngest and most delicate

Green tea, black tea, and oolong are generally made out of the leaves of the plant. But white tea, that one’s special.

“White tea is the little baby buds,” says Hattie. “If you can imagine a fuzzy little pea shoot, that's what a tea plant looks like when it's just starting to be picked. Only the very first pick of the year can be considered really good quality white tea. You just pluck them between your fingers. It kind of looks like a tiny little butterfly pod or something. You pick that, and then process it similar to green tea.” 

Because it’s plucked at such a young stage and undergoes little if any oxidation, white tea is prized for its soft, fresh-from-the-garden flavor and aroma.

Caffeine levels are relative

When it comes to figuring out which variety will give you the most pep in your step, looks can be deceiving. 

“A lot of people associate black tea with being high in caffeine, but pound per pound it's really not,” reveals Hattie. “Most tea companies in the West use a method called CTC or Cut-Tear-Curl, where the tea is basically ground up into the fineness of a tobacco, with all the leaves broken up into really small pieces. That makes for a much more intense steep and a really intense brew, but it’s just because there's more leaves to water.  When people drink green tea, it's oftentimes the whole leaf, so you effectively get a little bit less caffeine but that’s because of surface area, not necessarily true caffeine content.”

Tea is loaded with healthy antioxidants

“All tea does contain antioxidants, but white, green, and black teas have different amounts,” Hattie says. “Green tea and white tea are highest in things like epigallocatechin or ECGC, which is a really potent antioxidant that you see in extracts and supplements.”

ECGC is a catechin, a type of phenolic compound that’s markedly high in antioxidant activity and therefore associated with a whole host of human health benefits, including improved cardiovascular and immune system functioning. Oolong and black tea are more heavily processed than their lighter siblings, so they’re considered to have slightly lower antioxidant levels, namely less ECGC, by the time they land in our cupboards. 

Temperature matters

Little known fact: Boiling water is not always best.

“If you want to improve your tea experience, experiment brewing with different water temperatures,” Hattie says. “So often when you go to a fast food place or restaurant and ask for anything other than black tea, it's horrible. Like if you go to Tim Horton's for a green tea, it's pretty miserable. You’re thinking, ‘Why would anyone ever drink this?’

“But the truth is when you brew tea with different water temperatures, you bring out different aspects in the tea. Green tea actually burns really easily -- the leaves are really delicate because they haven't been processed very much. So when you steep it in boiling water right off the stove, you're drawing out more of the tannins and more of the caffeine, all these dry and bitter elements, which is not what you want. You want these sweet vegetal notes, asparagus and steamed greens, things like that. With cooler water, say around like 80 or 85 degrees Celsius, you get all those nice components."

The same things also goes for oolong. Instead of torching it with boiling water, aim for between 185 and 195 degrees Fahrenheit. The delicate leaves will respond better to the gentler heat and the unique characteristics of the tea will be easier to taste and better on your palate.

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There’s an art to pairing food with tea -- and we’re not just talking cucumber sandwiches

Putting on an elaborate afternoon tea has long been an integral part of the luxury hotel experience, both in Europe and in the States. But thanks in part to modern tea pros like Hattie, many of today’s hotels are upping the culinary ante, transforming the stuffy finger-sandwich-fueled spreads of yesteryear into thoughtful and innovative bites that complement every piping-hot pot.

“For February, we have a special Chinese New Year tea and we prepare mooncakes,” says Thiago Frare, executive pastry chef at The Ritz-Carlton, San Francisco. The iconic property is famous for their afternoon tea program, held every other Sunday in the bright, airy Lounge. Chef Frare and his team develop each service’s menu with both the month’s theme and the tea list in mind, and for Chinese New Year that meant oolong madeleines, a mooncake that could stand up to savory and grassy green tea, and bold Quatre Fruits Rouges -- a black tea peppered with red fruit. 

“We have professionals on our property that have been working in tea for maybe 12 or 15 years, and they understand what the guests want and what tea is going to match perfectly with our products and the season,” continues Frare, who often incorporates tea into his dishes as a way of bringing everything together. “We are always trying to link things that we use, like matcha, lavender, chamomile, and ginger. In our pastry, we use green tea on a regular basis and we also serve a lavender-chamomile pâte de fruits. If you start the meal with a chamomile tea and then your last bite is a chamomile pâte de fruits, it's a nice experience. We can close the cycle.”

Tea is the great equalizer

Despite its complex history, health benefits, economic importance, and nuanced food-pairing powers, sometimes tea’s real beauty lies in its simplicity. “I'm fascinated by the social aspects of tea -- it's just nice,” Hattie muses. “You can go anywhere in the world and share a cup of tea with someone. If you’re both enjoying the tea, the conversation just starts flowing.”

Every common tea variety, explained

Now that you know everything else about tea, here's a quick cheat sheet for the most common varieties. Consider it tea 101.

green tea

Green Teas

Gunpowder: Bold, slightly smokey Chinese tea made up of tightly rolled pellet-like leaves that resemble grains of gunpowder 

Dragon Well (Longjing): Pan-roasted tea from China’s Zhejiang Province praised for its high quality and sweet, rounded flavor

Chun Mee: Chinese tea with leaves rolled into an eyebrow shape (the literal translation is “Precious Eyebrow”) known for its dusty coloring, vegetal notes, and fruity plum-like tartnes

Sencha: Extremely popular, bright green whole-leaf Japanese tea with many different subvarieties based on season harvested, growing method, and brewing style

Matcha: Often highly caffeinated Japanese tea leaves ground into a fine powder and meant to be dissolved in liquid rather than steeped

White Teas

Silver Needle (Bai Hao Yinzhen): Prized delicate, woodsy, and aromatic golden tea made from small silver buds and mainly produced in China’s Fujian Province

White Peony (Bai Mudan): Full-bodied, floral, and pale green-hued tea made from the buds and top two leaves of a young plant shoot

Tribute Eyebrow (Gong Mei): Mid-grade white tea grown in China’s Guangxi and Fujian Provinces  
and known for its bold, fruity flavors 

Long Life Eyebrow (Shou Mei): Strong golden yellow tea from China’s Guangxi and Fujian Provinces made from the low-quality leaves left over from previous harvests

White tea blends: A vast array of infusions, tinctures, and blends with many different fruits and herbs, often for medicinal purposes

tea teas leaves leave types explained thrillist green black oolong white
Africa Studio/Shutterstock

Black Teas & Black Tea Blends

Lapsang souchong: Chinese tea smoke-dried over pinewood to create a sharply smoky, woodsy flavor and aroma

Assam: Full-bodied, earthy, and malty tea from the northeast Indian state of Assam

Darjeeling: Grown in West Bengal, India and known for its light body, floral aroma, and tannic spiciness

Ceylon: Honey-colored or reddish-brown tea with light and floral or rich and full-bodied characteristics depending on growth

Earl Grey: A mix of Chinese-grown black tea and fragrant bergamot oil named after former British Prime Minister Charles Grey

English Breakfast: Traditionally made from a combination of Assam, Ceylon, and Kenyan-grown black teas and known for its bitterness, brown color, and robust yet rounded flavor

Irish Breakfast: Strong black tea blend generally dominated by Assam leaves and sharing a similar profile with English Breakfast

Masala Chai: Bold black tea from India usually made from a type of Assam that’s been cured into a dissolvable powder then mixed with a number of warming spices like cinnamon, ginger, cardamom, anise, fennel, nutmeg, and cloves, in addition to sweeteners and often served with milk

Oolong Teas

Iron Goddess of Mercy (Ti Kuan Yin or Tie Guan Yin): Very popular Chinese tea grown in the Fujian Province’s mountainous Anxi region and beloved for its refreshing qualities, honeyed flavor, and orchid-like aroma

Red Robe Tea (Da Hong Pao): Heavily-oxidized, dark orange-hued tea from China’s Wuyi Mountains with intense smoke and caramel notes and a markedly high price tag

Phoenix (Dan Chong or Dan Cong): Flavorful, full-bodied tea harvested from a single bush grown in China’s Guangdong Province with different characteristics depending on the batch’s origin plant

Milk Oolong (Nai Xiang): Creamy, and easy-drinking Taiwanese tea first created in 1980

Pouchong: Very airy and floral Chinese or Taiwanese tea made from pale unrolled leaves

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Shulevskyy Volodymyr/Shutterstock

Herbal Teas

Chamomile: Herbal infusion made from several different species of a daisy-like plant in the Asteraceae family and thought to treat stomach aches, inflammation, and insomnia

Chrysanthemum: Very aromatic mix of dried chrysanthemum petals often served with Chinese Dim Sum

Hibiscus: Brightly-colored, tart infusion made from the hibiscus plant, often blended with rosehip and served either hot or cold

Kava: Powdery tincture made from a root native to the South Pacific islands used for relaxation and other neurological purposes, including as a natural alternative to synthetic antidepressant and antianxiety medications

Rooibos (Red Bush): Earthy, bright, and caffeine-free infusion made from a ruddy, red-colored South African plant loaded with antioxidants 

Pennyroyal Tea: One of Nirvana’s most severely underrated bangers

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Meredith Heil is a Thrillist contributor.