Jambu
Also known as jambú, Pará cress, paracress, toothache plant, buzz button, Acmella oleracea
Quick answer
The Amazonian herb that makes the mouth tingle, buzz and go numb. Its leaves and yellow flower buds are cooked in the tucupi broths of Pará — tacacá and pato no tucupi — and the sensation comes from spilanthol, an alkylamide related in structure to the compounds that make Sichuan pepper numbing.
- Tastes of
- tingling, numbing, grassy, mouth-watering
- Heat
- Scoville does not apply
- If you have none
- Sichuan pepper — see the limits
Other names
What this spice is called elsewhere, and where the translation is not clean.
jambu
Portuguese — Pará and the Brazilian Amazon
toothache plant
English
A name from its traditional use as a mouth numbing agent. It describes the sensation, not a recommendation.
Flavour and aroma
Mildly grassy at first, then a spreading tingle, a buzzing or electric sensation, numbness and a rush of saliva. The effect is strongest from the flower heads and lasts some minutes.
Grassy and faintly herbal; the herb is not strongly aromatic.
Dark green leaves and small golden-yellow conical flower heads.
Taste, smell and sensation, channel by channel
Smell, taste and the chemical sense of heat and cold are different senses. Each is listed with the compounds evidenced as producing it.
Sensation
- Tingling — Spilanthol
Jambu’s tingling and numbing come from spilanthol, an alkylamide structurally related to the sanshools of Sichuan pepper. The receptor mechanism shown for sanshool has not been established for spilanthol, and none is asserted here.
- Numbing — Spilanthol
The numbness follows the tingle and has the same source, spilanthol, concentrated in the flower heads. Its receptor mechanism is not settled.
Soft leaves that wilt quickly in hot broth; the flower heads keep some firmness.
Heat
Pungency scale: other than Scoville, piperine or isothiocyanate
Not hot. A tingling, buzzing numbness with strong salivation.
- spilanthol
A trigeminal sensation of the same broad family as Sichuan pepper’s, from a structurally related alkylamide. The receptor mechanism established for the sanshools has not been established here for spilanthol, and is not claimed.
- Spilanthol — An unsaturated alkylamide, concentrated in the flower heads, and the source of the tingling, numbness and salivation. It is structurally related to the sanshools of Sichuan pepper.(what spilanthol is)
Pairings
Ranked by how well established the combination is, with the reason and the caveats attached.
Foods
Duck
ClassicPato no tucupi — duck roasted, then simmered in tucupi and served with jambu — is the festive dish of Belém. The numbing herb lightens the rich duck.
How: Pato no tucupi
Other spices and blends
Culantro
StrongCulantro, called chicória in Pará, seasons the tucupi in which jambu is served. The pungent green leaf and the tingling herb are the two aromatics of tucupi cooking.
How: Tucupi broths; Tacacá
If you have no jambu
What to use instead, and — more usefully — where each replacement stops working.
Sichuan pepper
PoorUse: 0.1–0.25× by weight — A small pinch of freshly ground husk per bowl, for the tingle only.
Supplies a related tingling numbness from a related class of compound, and nothing else. There is no green herb, and Sichuan pepper brings a strong citrus-floral aroma tacacá has never had.
| Flavour | Aroma | Colour | Heat |
|---|---|---|---|
| different | different | different | n/a |
Works for
- Recalling the tingle of tucupi dishes far from Pará
Does not work for
- Tacacá and pato no tucupi as dishes — the wilted herb is an ingredient, not only a sensation
- Anyone expecting the grassy flavour of the leaves
Why there is no second option: The only option recorded, and a poor one argued rather than omitted. No other herb in the catalogue numbs; Sichuan pepper and sanshō are the only ingredients with a comparable sensation, and both are dry spices with strong aromas of their own. Frozen or dried jambu from a Brazilian grocer is always the better answer. Editorial judgement.
Preparation and use
Blanch the leaves and flower heads briefly, or add them to the hot broth at the end. Serve at once; the tingle is strongest while the herb is fresh from the pot.
Tacacá, pato no tucupi, arroz paraense and other tucupi dishes of Pará; salads; and cachaça de jambu. It pairs with tucupi, dried shrimp, duck, fish, garlic, chicória (culantro) and chilli.
- boiling — Blanched or wilted briefly in the hot tucupi broth just before serving. The tingle survives brief cooking well; long boiling dulls the leaves and the effect.
- infusing — Steeped in cachaça to make cachaça de jambu, which carries the tingle into a drink.
Storage and freshness
| Form | Good for | Conditions | Fridge |
|---|---|---|---|
| Fresh | 0–0 months | Refrigerated, wrapped loosely. | Yes |
Chew a flower head. Fresh jambu tingles within seconds.
- Yellow or slimy leaves
- A weak tingle
- Wilting and yellowing
- Loss of the tingling effect as the herb ages
Quality is not the same as safety
Wilted jambu is a quality matter. Slimy or mouldy leaves should be discarded.
Forms
These forms differ enough to need separate answers: treating them as interchangeable produces a dish that is wrong.
Fresh jambu
Bunches of leaf and flower heads; the form that matters.
Not interchangeable with leaf
Dried jambu keeps some of the tingle and loses the green herb, and is a poor stand-in in tacacá. The fresh flower heads are the most potent part.
Dried jambu
Dried leaf and flower, sold outside the growing region. Weaker and duller.
Not interchangeable with fresh
Use more, add late, and expect less of both flavour and sensation.
Commonly confused with jambu
Direct comparisons, each with the difference that actually changes what you cook.
Botany
Long known as Spilanthes oleracea, the name from which spilanthol takes its own.
Asteraceae
The daisy family.
The leaves and the small conical flower heads. The flower heads are the most intensely tingling part.
A low, sprawling annual herb with soft, slightly fleshy leaves and small conical yellow flower heads, sometimes red-tipped, on long stalks. It is known only in cultivation.
Commonly confused with
The comparison that explains jambu, not a substitution. Both cause tingling and numbness through alkylamides — spilanthol in jambu, the sanshools in Sichuan pepper — and the two sensations are recognisably related. Sichuan pepper brings a strong citrus aroma and is used dry; jambu is a green herb cooked in broth. One cannot replace the other in a dish.
How it is grown
The plant, how it is propagated and farmed, what threatens the crop, and where it is produced now. Crop diseases here are plant health, not food safety.
The soft leaves and the small conical yellow flower heads of a low, sprawling annual.
How it is propagated
- Seed.
From seed, or from cuttings.
- Stem cuttings.
From cuttings, or from seed.
Where it comes from and how it is made
Brazil, where it is known only as a cultivated plant, probably selected from wild Acmella of the region.
- Brazil (Pará and the Amazon) — origin. Grown by market gardeners around Belém for fresh sale.
Cut as bunches of leafy stems with flower heads, sold fresh.
A short-cycle market-garden crop, grown in beds and sold in bunches.
Warm and humid, with plenty of water.
Buying and quality
Fresh or frozen. Dried jambu is a last resort that keeps some tingle and loses the herb.
- Bunches with plenty of intact flower heads.
- Firm green leaves without yellowing.
- A quick tingle when a flower head is chewed.
History and trade
Jambu is an Amazonian cultivated plant long used in the cooking of Pará, where it is paired with tucupi — the yellow broth made from the juice of bitter cassava after its toxic compounds are removed by fermentation and boiling. Its use as a mouth-numbing agent for toothache gave it its English name.
Culture
Recorded by tradition rather than merged into one narrative — these are genuinely different practices.
Pará and Belém
Pará and Belém, Brazil.
Jambu is inseparable from tucupi. Tacacá — a hot broth of tucupi with cassava starch, dried shrimp and jambu, served in a gourd bowl from street stalls in the late afternoon — and pato no tucupi, duck cooked in tucupi and served with jambu for the Círio de Nazaré festival in October, are the defining dishes of Belém, and the tingle is part of their identity.
- Tacacá
- Pato no tucupi
- Arroz paraense
- Cachaça de jambu
Used to numb the mouth for toothache in folk practice, which gave it its English name. Recorded as tradition; SpiceHQ makes no health claim.
What it is called
- Portuguese: jambu
What we do not know
Published openly. A gap we have named is more useful than a gap we have filled with plausible prose.
Not yet established for jambu:
- Archaeological evidence
- Historical timeline
- Regulatory limits