If you have been wondering how to make black bean tea, the short version is simple: dry-roast a handful of black soybeans until they smell toasty and nutty, then simmer or steep them in hot water and strain. Black bean tea is a warm, gently sweet, caffeine-free drink with a deep roasted flavor. It is served hot in cooler months and poured over ice when the weather turns warm, and the whole process takes only a few minutes of hands-on time.
Known in Korea as geomeun-kong-cha, it belongs to the same comforting family as the roasted-grain teas of East Asia — the kind of everyday cup you can sip all day without a jolt of caffeine. If you are new to caffeine-free infusions in general, our overview of what herbal tea is covers the wider world of tisanes; here we will focus on the beans, the roast, and the pour.
What black bean tea is (and what it tastes like)
Black bean tea, also called black soybean tea, is made from black soybeans — small, black-skinned soybeans traditionally known as seoritae. Roasting and steeping them gives a liquid that ranges from amber to deep brown, with a warm, nutty, faintly sweet flavor a little like a mellow barley tea. There is no bitterness and no tannic edge — just a soft toasted-bean character, a clean finish, and a gentle aroma that many people find soothing.
In Korean home cooking it is an everyday, no-fuss drink: brewed in a pot, kept in the refrigerator, and poured whenever someone is thirsty. It sits alongside roasted barley and roasted corn tea as one of East Asia's roasted-grain and roasted-seed teas — humble, caffeine-free, and easy to make from pantry staples. Because it carries no caffeine at all, it suits late afternoons and evenings, and it works well for anyone who is cutting back on coffee or green tea but still wants something warming with real flavor.
Why dry-roasting is the key step
The single most important part of this black bean tea recipe is the dry-roast. Raw black soybeans steeped in water taste flat and beany. Toasting them first, in a dry pan with no oil, is what develops the nutty, coffee-adjacent aroma and the gentle sweetness that make roasted black bean tea worth drinking. As the beans heat, their natural sugars and proteins brown, some of the skins split with a soft crackle, and the flavor shifts from raw to rich and rounded.
Use black soybeans, not black turtle beans. Dried, the two can look alike, but turtle beans are a different plant grown for stews and salads and will not give the same toasty, tea-friendly result. Look for whole dried black soybeans, sometimes labeled seoritae or simply black soybean. The variety with a green interior is especially prized, but any whole black soybean will make a good cup. If you use a longer, lower roast, the flavor deepens further, so let your nose be the guide rather than a strict clock.
What you need
The ingredient list is short, and you almost certainly have most of it already.
- About 2 to 3 tablespoons of whole dried black soybeans for every 3 to 4 cups (roughly 750 ml to 1 liter) of water. Use a little more for a stronger, darker cup.
- Fresh, clean water.
- Optional: a tiny pinch of salt in the pot, which rounds out and lifts the flavor, or a little honey stirred into the finished cup if you like it sweet. (Never give honey to infants under 12 months.)
For equipment you need only a dry frying pan or small pot for roasting, a pot for simmering, and a strainer. That is the entire kit — no special gear required.
How to make black bean tea, step by step
Here is the full method, from raw beans to a finished pot. The roasting and the brewing each need just a few minutes of attention, so it is easy to fit around other cooking.
- Rinse and dry the beans. Give the black soybeans a quick rinse under cool water to remove any dust, then spread them on a clean towel and pat them dry. Dry beans roast far more evenly than damp ones.
- Dry-roast them. Put the beans in a dry pan over medium heat with no oil. Shake or stir them often for about 5 to 8 minutes, until they smell distinctly toasty and nutty and some of the skins lightly crack. For a deeper, darker cup you can drop to low heat and roast longer. Keep them moving so they color evenly rather than scorch, and lower the heat if they darken too quickly.
- Add water and brew. Now pick one of two ways. To simmer, tip the roasted beans into a pot with the water, bring it to a gentle boil, then simmer for 10 to 15 minutes for a fuller, darker tea. To steep, place the hot roasted beans in a teapot, pour just-off-the-boil water over them, and let them steep for 5 to 10 minutes for a lighter, cleaner cup.
- Strain and serve. Strain out the beans and pour. Drink it hot straight away, or let it cool and chill it over ice for a refreshing iced tea. Add the optional pinch of salt to the pot, or a little honey to the cup, to taste.
The two methods are worth trying side by side: simmering pulls out more color and body, while a straight steep keeps things delicate. Once you know which you prefer, this becomes a two-minute habit.
| Step | Time | Note |
|---|---|---|
| Rinse and pat dry | 1-2 min | Dry beans roast more evenly |
| Dry-roast in a pan | 5-8 min | Medium heat, keep shaking until fragrant and lightly cracked |
| Simmer for a fuller cup | 10-15 min | Gentle boil, then a low simmer |
| Or steep for a lighter cup | 5-10 min | Just-off-boil water over the roasted beans |
| Strain and serve | 1 min | Hot, or chilled over ice |
A second pot, and eating the beans
The beans still hold plenty of flavor after the first pot. Add fresh water and re-simmer them for a second, lighter batch — a thrifty habit shared with barley and other roasted-grain teas. The softened beans left behind are edible too: once they have simmered they are tender enough to eat plain, season with a little salt, or stir into rice or a bowl of soup, so nothing goes to waste.
Ways to serve and vary it
Black bean tea is happy to be adjusted. Serve it hot and plain to taste the roast most clearly, or brew a bigger, stronger pot, chill it, and keep a jug in the fridge for iced tea through a warm week. A pinch of salt makes the nuttiness pop; a spoonful of honey turns it into a gentle after-dinner drink. You can also blend the roasted beans with roasted barley or corn to build your own house roasted-grain tea, adjusting the ratio until the flavor suits you.
Storing roasted black soybeans
It pays to roast a bigger batch so you can brew all week. Let the roasted beans cool completely, then store them in an airtight jar away from heat and light. Kept dry, roasted black soybeans hold their aroma for a few weeks; if they begin to smell dull or stale, simply roast a fresh batch. Brewed tea keeps in the refrigerator for a couple of days — give it a sniff before drinking and, when in doubt, throw it out.
If you want to fine-tune water temperature and steeping time across all your caffeine-free cups, our guide to how to brew herbal tea goes deeper on getting infusions right.
A light note on soy and safety
Black soybeans are an ordinary, everyday food, and black bean tea is simply water infused with roasted beans, so most people can enjoy it freely. A few sensible notes still apply. Anyone with a soy allergy should skip it entirely, since it is made from soybeans. If you are pregnant or breastfeeding, or you take regular medication and would like to drink it often, it is worth a quick word with your own healthcare provider first.
People sometimes ask about the wellness side of roasted bean and grain teas. Any such effects are mild and differ a great deal from one person to the next, so it is best to treat this as a comforting drink rather than a remedy — responses vary, and this is not medical advice. Enjoy it for exactly what it is: a warm, nutty, caffeine-free cup you can make from a handful of beans in minutes.