Barley tea

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About this tea
Origin and tradition
TCM properties
Traditional uses
Ingredients
Method
Variations and pairings
When to drink it
Cautions and contraindications
Frequently asked questions
Related pages

1. About this tea

Barley tea — da mai cha (大麦茶) in Mandarin, mugicha in Japan, boricha in Korea — is made by roasting whole barley grains until dark brown and steeping or simmering them. The result is amber to deep brown, toasty, faintly bitter and nutty, with something of the character of a very light coffee and none of the caffeine.

It is the most everyday drink on this page by a wide margin. Across East Asia barley tea is what sits on the table at mealtimes and in the fridge through summer — the default household beverage rather than a remedy. It is given to children and to the elderly, drunk hot in winter and iced in summer, and treated more as water with flavour than as medicine.

2. Origin and tradition

Barley is one of the oldest cultivated grains in China, and roasted grain drinks are ancient and widespread. Barley tea became a fixture of Japanese and Korean daily life in particular, where it remains the standard bottled and household drink; in Japan chilled mugicha is essentially the drink of summer.

One point of confusion is worth clearing up. Roasted barley tea uses the whole roasted grain. The Chinese medicinal herb mai ya is germinated barley — barley sprouted and then dried — and it is a different preparation with a different action, used for food stagnation from starchy foods and, distinctively, to reduce lactation. The two are often conflated online. This page is about the roasted grain drink.

3. TCM properties

Barley tea is a roasted whole-grain drink rather than a prescribed herb, so it has no direct herb-page counterpart. The related Chinese medicinal mai ya is germinated barley, a different preparation with a different clinical action — see that page for the prescribed herb, and note that it is not what is described here.

Roasted barley (da mai)

Thermal nature: Cool (roasting makes it more neutral)
Flavour: Sweet, salty
Channels entered: Spleen, Stomach
Actions: Harmonises the Stomach; assists digestion; drains damp and promotes urination; clears summer heat

Roasting matters to the TCM reading. Raw barley is distinctly cool and damp-draining; roasting warms its character towards neutral and adds the aromatic, digestive quality that makes it suitable as an everyday drink. The darker the roast, the more warming and the less cooling the resulting tea — which is why lightly roasted barley suits summer and a dark roast suits winter.

4. Traditional uses

Everyday digestive support

The most honest description of barley tea's role is that it is a pleasant drink that sits well with food. In TCM terms it harmonises the Stomach and assists the digestion of grains and starches, which is why it accompanies meals across East Asia. It is not a remedy for a specific complaint so much as a daily habit that supports digestion.

Summer heat and thirst

Barley's cool, damp-draining nature makes it a traditional summer drink, and chilled barley tea is drunk in enormous quantities across Japan and Korea in hot weather. It quenches thirst well and, being caffeine-free and unsweetened, does so without the drawbacks of soft drinks.

Damp and heaviness

Barley promotes urination and drains damp, the TCM pattern of heaviness, puffiness and sluggishness. Its action here is mild — far gentler than corn silk — but it is a reasonable everyday background measure for anyone with a damp constitution.

A caffeine-free everyday drink

This is a genuinely useful and underrated role. Barley tea gives a warm, roasted, satisfying drink with no caffeine at all, which makes it a good evening substitute for tea or coffee, suitable for children and in pregnancy, and unlike most herbal teas it does not taste medicinal.

5. Ingredients

2 tbsp roasted barley grains, or 1 barley tea bag
1 litre water
Optional: a strip of roasted corn, a common Korean combination

Ready-roasted barley is sold loose or in bags by Asian supermarkets, labelled mugicha, boricha or barley tea. You can also roast your own: rinse and thoroughly dry pearl or whole barley, then dry-fry in a heavy pan over medium heat, stirring constantly for 10–15 minutes until the grains are deep chestnut brown and smell strongly of toast. Do not let them blacken, which turns the tea acrid. Home-roasted barley keeps a couple of months in an airtight jar; buy unhulled or pearl barley from any supermarket for this.

6. Method

For hot tea: simmer 2 tbsp roasted barley in 1 litre of water for 5–10 minutes, then strain.
For a lighter cup: steep the grains in just-boiled water for 5 minutes without simmering.
For iced tea: simmer as above, cool, then refrigerate; or cold-brew by leaving the grains in cold water in the fridge overnight.
Strain out the grains before storing, or the tea turns increasingly bitter.
Drink hot in cold weather, chilled in summer.

Made in litre batches and kept in the fridge, this is the easiest of all these teas to work into daily life — which is precisely how it is used in Japan and Korea. Refrigerated, it keeps two to three days; discard it after that, as unsweetened grain infusions ferment.

7. Variations and pairings

With roasted corn: the standard Korean combination, sweeter and rounder in flavour.
With brown rice: roasted rice added to the barley gives a fuller, nuttier drink.
Dark roast for winter: a deeper roast produces a warmer, more coffee-like tea better suited to cold weather.
Light roast for summer: a paler roast keeps more of barley's cooling, thirst-quenching character.
With a slice of ginger: warms the drink for anyone with a cold digestion who finds plain barley tea too cooling.

8. When to drink it

With meals, as an everyday table drink
Chilled through hot summer weather
As a caffeine-free evening alternative to tea or coffee
For children and anyone avoiding caffeine
Background support for a damp constitution

Any time, in more or less any quantity — this is the one tea here that genuinely can replace water in daily life, and across much of East Asia it does. There is no course length to observe and no need to stop and start.

9. Cautions and contraindications

Coeliac disease and gluten sensitivity: barley contains gluten. Barley tea is not gluten-free and must be avoided in coeliac disease.
Breastfeeding: germinated barley (mai ya) is used in Chinese medicine specifically to reduce breast milk supply. Roasted barley tea is a different preparation and is widely drunk while breastfeeding in Asia, but if you are struggling with supply it is reasonable to be cautious and discuss it with your midwife or lactation consultant.
Cold constitutions: barley is cool by nature. If you feel the cold badly, choose a darker roast, drink it hot, or add ginger.
Very cold or iced: iced drinks are discouraged in TCM for weak digestion — drink it warm if your digestion is delicate.
Storage: discard refrigerated barley tea after two to three days; unsweetened grain infusions spoil.
Barley allergy: rare but real — avoid if you react to barley or malt.

10. Frequently asked questions

Is barley tea the same as mai ya?

No, and this is the most common confusion. Barley tea is the whole grain, roasted. Mai ya is germinated barley, a distinct Chinese medicinal used for starch-related food stagnation and to reduce lactation. Different preparation, different action.

Does barley tea contain caffeine?

None at all. It is a roasted grain infusion, not a true tea, which is why it is given to children and drunk in the evening across East Asia.

Is it gluten-free?

No. Barley contains gluten, and barley tea is unsuitable for anyone with coeliac disease. This catches people out because it is a drink rather than a food.

Can I drink it while breastfeeding?

Roasted barley tea is drunk widely by breastfeeding mothers in Japan and Korea without issue. The caution attaches to germinated barley (mai ya), which is used to reduce supply. If your supply is already a concern, mention it to your midwife or lactation consultant.

Can I roast my own barley?

Yes, easily. Dry-fry rinsed and dried pearl or whole barley in a heavy pan over medium heat for 10–15 minutes, stirring, until deep brown and fragrant. Stop before it blackens. It is markedly better than most bagged versions.