Oceania → Cook Islands → Rarotonga
🥤 DRINK

Tumunu (Bush Beer)

The Cook Islands' home-brewed orange "bush beer", fermented in secret and shared in a coconut-shell cup at a tumunu gathering.
Cook Islander · medium · serves 8
prep 20 min · cook 0 min · plus 2 days hands-off time
~302 cal · 2g protein · 78g carbs · 0g fat · 5g fiber · 70g sugars · 0g sat fat (estimated, per serving)
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Cloudy orange bush beer poured into a coconut-shell cup
AI-generated illustration
On Atiu in the Cook Islands, a tumunu is both a drink and the gathering built around it. The word means the hollowed base of a coconut trunk, the barrel in which the brew was traditionally made, and the bush-beer sessions have gone on for around two centuries. When missionaries banned kava in the early 1800s, whalers had already taught islanders to beer from oranges, and the orange brew quietly took its place.
The beer is made from oranges, sometimes with banana or pawpaw, plus sugar and water, set to with yeast (or a little sediment saved from the last batch) in a covered vessel. At a tumunu, the barrel-keeper leads the session: the cup, a small coconut shell, goes round the circle, a rap on the barrel calls for a pause and a prayer, and then it is open forum, with visitors expected to introduce themselves.
Cloudy, tangy, and potent, tumunu is genuine home-brew and its alcohol content is unpredictable, so it is sipped socially and with care. More than the taste, it is the ritual of the shared shell and the circle that makes tumunu a living Cook Islands tradition.
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Make it yours

✓ Naturally vegetarian, vegan and gluten-, dairy-, egg-, nut- and pork-free. No swaps needed.
Toggle a diet and the ingredients rewrite themselves with regional substitutes.
Dietary labels are a cooking guide, not allergen-safety advice. We track dairy, egg, gluten, tree nuts and peanuts (we count coconut as a tree nut, following FDA labeling), fish, and shellfish; we do not screen for sesame, soy, mustard, celery, or sulphites. If you have a food allergy, read the label on every product you use, and note that a kitchen can cross-contaminate in ways a recipe cannot control.

Ingredients

Serves 8
  • 12 oranges, juiced
  • 1 ripe banana, mashed (optional)
  • 2 cups sugar
  • 8 cups water
  • 1 tsp brewing yeast

Instructions

  • 1
    Combine the orange juice, mashed banana if using, sugar, and water in a large clean fermenting vessel and stir until the sugar dissolves.
    ✎ Chef’s note
    On Atiu a little sediment from the previous batch is stirred in to start the ferment; a teaspoon of brewing yeast does the same job.
  • 2
    Sprinkle in the yeast, stir once, and cover loosely so gas can escape while dust cannot get in.
  • 3
    Leave it to ferment in a warm, dark place for several days, tasting daily, until it turns tangy and lightly fizzy.
  • 4
    Strain off the clear brew from the sediment into cups or a jug.
  • 5
    Share it round in a coconut-shell cup. This is an unmeasured home-brew, so treat its strength with respect and drink it slowly.
Atiu tumunu tradition.

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🌏 While it simmers, know your destination

📍
Rarotonga. The traditional fish for ika mata is maroro, the flying fish, taken at night by boats carrying bright lights that make the fish leap toward them and into the nets. The coconut cream is grated and squeezed by hand on the day, which is the part islanders insist on.
🗺️
Cook Islands. The order matters in ika mata: the fish is cured in citrus first and only then dressed in coconut cream, because doing it the other way round leaves the fish raw under a coating. The traditional fish is maroro, the flying fish, caught at night by boats carrying bright lights, and the coconut cream is grated and squeezed fresh rather than opened from a tin.
🌍
Oceania. The twentieth century changed the Pacific plate faster than anything before it. White rice, tinned corned beef, mutton flaps, flour and sugar arrived by ship and are now entirely everyday, and the public health consequences are among the most closely studied anywhere. Alongside that, Australian and New Zealand kitchens have taken up Asian technique and Maori and Pasifika cooking in a way they had not before.
The story behind this dish is up top, worth a read while the pot works.

More from Cook Islands

Ika MataRaw fish cured in lime and bathed in fresh coconut cream with cucumber, tomato, and spring onion.
Cook Islands PokeCooked ripe banana bound with arrowroot and baked until translucent, drowned in thick coconut cream, eaten at breakfast, at teatime, or alongside the main meal.
Curried SausagesBrowned sausages simmered in a mild curry-and-coconut gravy over rice, a Rarotongan family lunch.
Browse all Cook Islands recipes →

Good to know

Storing it: Keep chilled and covered, and enjoy within 2 to 3 days.

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Frequently asked questions

What is Tumunu (Bush Beer)?

The Cook Islands' home-brewed orange "bush beer", fermented in secret and shared in a coconut-shell cup at a tumunu gathering.

Where does Tumunu (Bush Beer) come from?

Tumunu (Bush Beer) is a Cook Islander dish from Rarotonga, Cook Islands.

Can Tumunu (Bush Beer) be made vegan, gluten-free, or dairy-free?

This Tumunu (Bush Beer) recipe includes substitution suggestions for vegetarian, vegan, gluten-free, dairy-free, nut-free, egg-free, and pork-free versions. Treat the substitutions as a starting guide rather than a guarantee, and see the allergen note below.

Is Tumunu (Bush Beer) safe for people with food allergies?

Our dietary labels and substitutions are a cooking guide, not medical or allergen-safety advice. We track dairy, egg, gluten, tree nuts and peanuts (we still count coconut as a tree nut to be cautious, although the FDA stopped listing it as one in 2025), fish, and shellfish, but we do not screen for sesame, soy, mustard, celery, or sulphites. If you have a food allergy, always read the label on every product you use, and remember a home or commercial kitchen can cross-contaminate ingredients in ways a recipe cannot control.

How long does Tumunu (Bush Beer) take to make?

About 2 days in all: 20 minutes prep and 0 minutes cooking, plus 2 days of hands-off waiting the method needs, serving 8.

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