If you want to know how to make corn tea, the short answer is simple: dry-roast dried corn kernels until they turn deep golden and smell like toasted popcorn, then simmer or steep them in hot water. This is oksusu-cha, the everyday roasted-grain tea from Korea — a mellow, gently sweet, caffeine-free cup made from the roasted corn GRAIN, not the fine corn silk. Serve it steaming through winter or chilled over ice all summer.
Below you will find the full method, exact amounts, a quick timing table, and notes on storage and a light second brew. If roasted-grain teas are new to you, the wider family is worth exploring — corn tea sits right alongside roasted barley tea and roasted black bean tea as one of East Asia's most beloved everyday cups.
How to Make Corn Tea: The Quick Answer
Corn tea, known in Korea as oksusu-cha, comes together in three moves: roast, brew, strain. You dry-roast dried corn kernels in a pan until deep golden, simmer them for 10 to 15 minutes (or steep them for 5 to 10 minutes in just-off-boil water), then strain and pour. That is the whole roasted corn tea recipe. The dry-roasting is the step that matters most, because it is where the toasty, popcorn-sweet flavour is built. Everything after it is just hot water and patience.
What Corn Tea Is
Corn tea is a warm, nutty, gently sweet infusion with a flavour a lot of people describe as liquid roasted popcorn or cornbread. It has no tea leaf in it at all, so it carries no caffeine, which is a big part of why it is poured freely all day, offered to children, and kept in the fridge by the pitcher. In Korea it is called oksusu-cha, where oksusu means corn, and it belongs to a whole family of roasted-grain teas enjoyed across East Asia.
That family is worth knowing, because the members are often blended. Roasted corn is frequently combined with roasted barley to make a rounder, deeper cup — the corn brings sweetness and the barley brings a darker, coffee-adjacent toastiness. It is a genuinely everyday drink rather than a special-occasion one: kettles and pitchers of it appear in homes and restaurants as the default thing to sip. Because it is a grain infusion rather than a leaf infusion, you do not need to worry about bitterness from over-steeping the way you might with green or black tea. If you want the broader background on caffeine-free plant and grain infusions, our overview of what herbal tea is covers the basics so we can stay focused on the corn here.
Roasted Kernels, Not Corn Silk
This is the one point to be clear about before you start. Corn tea in the oksusu-cha sense is made from the roasted corn KERNEL — the dried grain itself. It is not made from corn silk, the fine pale strands found tucked inside a fresh husk. Corn-silk tea is a separate drink with its own preparation and its own character, and it is not what this recipe is about. Everything here is the roasted grain: whole dried kernels, toasted in a dry pan, then brewed.
You can buy dried corn kernels intended for tea, sometimes labelled corn tea or oksusu, and these are often already roasted so you can skip straight to brewing. You can also start from plain dried corn kernels (the kind sold for popping or for grinding) and roast them yourself, which is the version we will walk through because the home-roasting step is where the best flavour lives.
Why Dry-Roasting Is the Key Step
Dry-roasting is the whole trick. When you toast the kernels in a dry pan with no oil and no water, the sugars and proteins on the surface of the grain brown and develop those deep, popcorn-and-cornbread aromas. Skip or shortcut the roast and you get pale, watery, faintly starchy water instead of tea. Take the roast far enough and the same kernels give you a fragrant, amber, satisfying cup.
The two things to manage are heat and movement. Keep the pan on medium so the outsides colour steadily without scorching before the insides catch up, and keep the kernels moving — shake the pan or stir almost constantly — so they toast evenly. You are aiming for a deep, even golden-brown and a clear popcorn fragrance. A few kernels may pop or crackle, which is fine. If you smell anything sharp or acrid, pull the pan off the heat right away, because past golden the flavour turns bitter fast.
Ingredients You Will Need
- Dried corn kernels — about 2 to 3 tablespoons per few cups of water (roughly 3 to 4 cups / 700 to 900 ml). Use more for a stronger, darker pot.
- Water — filtered or fresh tap water, whatever you would normally drink.
- A pinch of salt (optional) — a tiny amount can round out the sweetness, the way a pinch does in cornbread. Leave it out if you prefer.
- Roasted barley (optional) — a spoonful blended in gives a deeper, toastier cup and is a classic pairing.
No sweetener is traditional or needed — the roast supplies the impression of sweetness on its own. A dry, heavy-bottomed pan or skillet, and a strainer, are the only equipment.
How to Make Corn Tea, Step by Step
- Rinse and dry the kernels. Give the dried corn a quick rinse to remove dust, then pat it thoroughly dry with a towel. Dry kernels roast; wet ones steam and stay pale.
- Dry-roast in a pan. Spread the kernels in a single layer in a dry pan over medium heat. Shake or stir often for 10 to 15 minutes until they are deep golden-brown and smell strongly of toasted popcorn. Take them off the heat the moment they smell nutty and rich rather than scorched.
- Simmer or steep. Add the roasted kernels to your water. To simmer, bring to a boil then drop to a gentle simmer for 10 to 15 minutes. To steep instead, pour just-off-boil water over the kernels and let them sit 5 to 10 minutes for a lighter cup. Longer contact means a deeper, more amber brew.
- Strain and serve. Strain out the kernels and pour. Drink it hot, or let it cool and chill it over ice — it is genuinely good both ways.
Here is the timing at a glance:
| Step | Time | Note |
|---|---|---|
| Rinse and dry the kernels | 5 min | Pat them fully dry so they roast instead of steam |
| Dry-roast in a pan | 10-15 min | Medium heat, shaking often, until deep golden and popcorn-fragrant |
| Simmer (or steep) | 10-15 min | Or steep 5-10 min in just-off-boil water for a lighter cup |
| Strain and serve | 1-2 min | Pour hot, or cool it down and chill over ice |
| Second pot (optional) | 10 min | Re-simmer the used kernels once for a lighter brew |
The steeping approach is more forgiving and about as hands-off as tea gets; for the general how-and-why of infusing grains and botanicals, our guide on how to brew herbal tea is a handy companion.
A Second Pot and Storing Your Kernels
Those roasted kernels still have flavour to give after the first brew. Once you have strained your pot, you can re-simmer the same kernels one more time for a second, lighter cup — perfect if you are drinking it all day and want something gentler in the afternoon. Add fresh water and simmer again for about 10 minutes; the colour and flavour will be softer than the first pass, but still clearly corn tea.
If you roast a big batch of kernels at once, store the extra roasted corn in an airtight jar somewhere cool and dark, away from moisture. Kept dry, roasted kernels stay good and fragrant for weeks, which makes brewing on demand as easy as scooping and simmering. Any brewed tea you are not drinking right away should go in the fridge in a covered pitcher and be finished within a couple of days.
Serving Corn Tea Hot or Iced
In the colder months, corn tea is a comforting hot pour — mellow, toasty, and easy to drink cup after cup. In summer, it shines chilled: brew it a little stronger than usual to allow for the ice, cool it down, and keep a jug in the fridge. Because it is unsweetened and caffeine-free, it works as an all-day table drink for the whole household, and its soft popcorn note pairs happily with almost any food. If you like blends, a little roasted barley stirred in gives you the deeper, darker cup many people grew up with.
A Light Note on Enjoying Corn Tea
Corn is a common, everyday food grain, and corn tea is simply that grain roasted and infused, so for most people it is an easy, gentle drink to enjoy freely. Responses vary from person to person, and this is not medical advice — we are talking about a nice cup, not a remedy, so it is best to skip any claims about what it might do for the body. If you are pregnant or breastfeeding, or you take regular medication and want to drink corn tea often, it is worth a quick word with your own healthcare provider first. Beyond that, enjoy it the way it is meant to be enjoyed: warm in your hands in winter, cold from the fridge in summer, and poured as often as you like.