Caju Assado

1. 1Nuts must be roasted inside the shell, not pre-shelled, so the toxic shell liquid (cardol/anacardic acid) is thermally neutralized before handling
2. 2Roasting over live fire or in an ungreased cast-iron pan with no added oil — dry heat only
3. 3Shelled by hand immediately after roasting, while the shell is brittle and the nut is still warm
4. 4Salted after shelling, not before — salt applied to the warm, exposed nut
5. 5Nuts are whole; splitting or halving before roasting is not canonical
6. 6The light char and smoky note from shell combustion is a defining flavor, not a defect

In-shell dry roasting

The double shell layer contains caustic cardol and anacardic acid; roasting in-shell over high direct heat combusts these compounds, making the kernel safe to handle and eat — pre-shelling skips this critical detoxification and produces a flat, steamed flavor rather than the signature smokiness

Hot-hand shelling

Shelling immediately after roasting while the shell is charred and brittle requires minimal force and preserves the whole kernel; waiting until cool re-hardens the shell and shatters the nut

Post-shell salting

Salt applied to the warm exposed kernel bonds to the surface oils released by heat; salting before roasting (in-shell) wastes salt and produces no flavor penetration

Served

warm or room temperature, loosely piled or wrapped in a paper cone

Temperature

warm to ambient

Portion

small handful (≈30–60 g), sold by volume scoop on the street

Pairs with

palm wine · bissap hibiscus drink · cold beer · ataké (local spirit)

• raw in-shell cashews → pre-shelled raw cashewsinadmissible

  loses smokiness and the in-shell detoxification ritual; kernel is safe but flavor is flat — widely done but not canonical

• coarse sea salt → fine table saltadmissible

  dissolves too quickly on warm nuts and oversalts unevenly; acceptable in practice but loses the visible salt crust

• wood/charcoal fire → gas flame or electric hob with heavy panadmissible

  reduces char and smoke character noticeably; acceptable for indoor preparation

• no oil → roasting with coconut or palm oilinadmissible

  produces a fried rather than roasted result; changes texture and flavor category entirely

• Roasting pre-shelled cashews instead of in-shell, skipping the detoxification step and losing smokiness
• Adding oil to the pan, which fries rather than roasts and makes the skin greasy
• Salting before roasting (in-shell), where salt cannot penetrate and is wasted
• Letting the nuts cool completely before shelling — the shell re-hardens and the kernel shatters
• Roasting at too low a temperature, which steams the nut rather than charring the shell
• Treating the char on the shell as a sign of burning and pulling too early — some blackening of the shell is correct and expected

Guinea-Bissau is among the world's largest per-capita cashew exporters, and the cashew tree (Anacardium occidentale) is the economic backbone of the country — over 80% of export revenue. Roasting and eating caju fresh from the harvest is a practice embedded in the agricultural calendar, predating the industrial export trade. The in-shell fire-roasting method is indigenous to the region and reflects practical necessity: the toxic shell liquid must be destroyed before safe consumption.

Claimed by: Guinea-Bissau

1. 1.FAO cashew production data, Guinea-Bissau country profile
2. 2.INEC Guinea-Bissau agricultural census documentation
3. 3.West African street food ethnographies (cashew belt fieldwork)

Confidence: high