US National Cashew Day
<p>Sometime between 1560 and 1565, Portuguese ships working down the western coast of India unloaded an unfamiliar tree at Goa. It came from north-eastern Brazil, where the Tupi people called its fruit acajú — “the nut that produces itself” — and the Portuguese had recognised, correctly, that its sprawling roots might bind the loose coastal soil against the monsoon rains. They planted it for erosion control. Four and a half centuries later, India and that Portuguese loanword, softened into kaju, sit at the centre of a global trade in one of the world’s most labour-intensive nuts. National Cashew Day, observed in the United States on 23rd November, celebrates that improbable traveller.</p>
<h2 id="a-brazilian-native-a-portuguese-passenger">A Brazilian native, a Portuguese passenger</h2><div class="ad-unit ad-in-article" aria-label="Advertisement">
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<p>The cashew, Anacardium occidentale, is wholly American by origin. It grew wild across the cerrado and coastal scrub of north-eastern Brazil, valued less for its seed than for the cashew apple — the swollen, juicy, astringent false fruit to which the seed clings. Portuguese traders, encountering it in the sixteenth century, did what the age of exploration did to so many plants: they moved it. From the Goan plantings it spread down the Indian coast and then onward through South-East Asia and into East Africa, carried as a hardy, drought-tolerant tree well suited to poor tropical soils.</p>
<p>The geography of cashews today reflects that diffusion almost exactly. Modern production is dominated not by Brazil but by the lands the Portuguese seeded: by the late 2010s, global output of cashew kernels reached around 5.9 million tonnes a year, with roughly 70 per cent coming from just three countries — Vietnam, India and Côte d’Ivoire. A Brazilian native has become an African and Asian crop, and the place it came from is now a minor player in the market it created.</p>
<h2 id="the-most-awkward-nut-in-the-world">The most awkward nut in the world</h2>
<p>What makes the cashew genuinely unusual is its anatomy. It is not enclosed in a tidy shell like an almond; instead the kidney-shaped seed hangs externally, dangling from the bottom of the cashew apple like an afterthought, a single seed per fruit. Worse, the shell that protects it is lined with a caustic resin — anacardic acid and urushiol, the same blistering compound found in poison ivy, to which the cashew is botanically related. Raw, in the shell, a cashew is not food but a chemical hazard.</p>
<p>This is why you will never see cashews sold in the shell as you would walnuts or pistachios. Every cashew that reaches a shop has been roasted or steamed to neutralise the resin, then carefully cracked and the kernel extracted by hand, work that historically exposed shellers to painful burns. That hidden labour — much of it still manual in producing countries — is the real reason cashews cost more than most nuts. The “raw” cashews sold in health shops are not truly raw at all; they have been steamed to make them safe.</p>
<p>The processing has a human cost that the snack bowl rarely acknowledges. Much of the world’s shelling has historically been done by hand, often by women, who crack the roasted shells and pick out the kernels in conditions where the caustic shell liquid can blister and scar fingers; protective gloves or oil coatings help, but the work is hard and poorly paid. India built its early cashew industry on exactly this manual dexterity, importing raw nuts from East Africa to be shelled by workers in Kerala and re-exported as finished kernels. Mechanised shelling has spread, particularly in Vietnam, but the cashew remains one of the few major snack foods whose economics still turn substantially on careful handwork.</p>
<p>That same shell liquid, far from being mere waste, is a valuable industrial commodity in its own right. Cashew nut shell liquid (CNSL), the dark resin pressed from the shells, is used in brake linings, varnishes, waterproof paints and resins — so the very substance that makes the raw nut dangerous to eat goes on to a second life in the chemicals industry, and a cashew operation sells not one product but two.</p>
<h2 id="why-the-day-matters">Why the day matters</h2><div class="ad-unit ad-in-article" aria-label="Advertisement">
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<p>A day for the cashew is partly a corrective. Most people eat them by the handful without a thought for the journey, and the holiday is a small invitation to notice the craft and the risk built into something so casually snacked upon — the steaming, the hand-cracking, the burned fingers, the four-and-a-half-century voyage from a Brazilian beach to a bowl on a coffee table. There is an economic dimension too: cashews underpin the livelihoods of millions of smallholder farmers and processors across the tropics, and the United States is among the largest importers in the world. Marking the day is, in its modest way, an acknowledgement of that long supply chain — a theme it shares with other food observances that honour everyday staples, from the orchards behind <a href="/specialdate/us-eat-a-red-apple-day/">US Eat a Red Apple Day</a> to the table spreads of <a href="/specialdate/us-national-vodka-day/">US National Vodka Day</a>.</p>
<h2 id="how-the-day-is-kept">How the day is kept</h2>
<p>Observing 23rd November is pleasingly simple: eat cashews. The date falls in late November, conveniently close to the American holiday season when bowls of nuts come out for guests, so the cashew arrives just as snacking peaks. Some keep it plain with a bowl of roasted, salted kernels; others cook. The cashew is one of the most versatile nuts in the kitchen, and the day rewards experiment — folding them into a curry, scattering them over a salad, blending them into butter or brittle. Plant-based cooks have a particular stake in it, since soaked and blended cashews form the silky base of dairy-free creams, sauces and cheeses, their natural fattiness mimicking dairy almost uncannily.</p>
<h2 id="a-cooks-nut-across-borders">A cook’s nut, across borders</h2>
<p>The cashew’s mild, faintly sweet flavour and high oil content make it a thickener as much as a garnish. In northern Indian cooking, a paste of ground cashews gives korma and other rich gravies their characteristic body and pale, luxurious sheen, and whole nuts crown festive rice and sweets such as kaju katli, the diamond-shaped, silver-leafed cashew fudge eaten at Diwali. South-East Asian kitchens pair them with chicken and chilli in stir-fries, the Chinese-American “cashew chicken” being a descendant of that tradition. In Brazil, the homeland it left behind, it is the cashew apple rather than the seed that dominates — pressed into the juice cajuína and into fermented drinks, a use almost unknown abroad because the fruit is too delicate to travel.</p>
<p>The cashew’s recent surge owes much to plant-based cooking, where its blandness becomes a virtue. Soaked overnight and blended, raw cashews break down into a smooth, neutral cream that takes on whatever flavour it is given, which is why they form the base of dairy-free “cheeses,” cashew sour cream, and the creamy sauces that thicken vegan pasta and curries. No other common nut does this quite so cleanly: almonds are too gritty, walnuts too bitter, peanuts too assertive. The cashew’s lack of a strong character, the very thing that once kept it in the shadow of the more glamorous almond and pistachio, turned out to be its great advantage once cooks needed a nut that could disappear into a sauce and simply lend it body.</p>
<p>Nutritionally the cashew sits a little apart from other nuts too. It is lower in fat than most and unusually high in carbohydrate, with a notable load of copper, magnesium and zinc; its fats are predominantly the monounsaturated kind associated with olive oil. Like all nuts it is calorie-dense, which is why it satisfies in small handfuls — and why a bowl of them disappears faster than is strictly wise.</p>
<h2 id="fun-facts">Fun facts</h2>
<ul>
<li>The cashew is a cousin of poison ivy, and its shell oil contains urushiol, the very compound that causes the rash — handling raw cashews can burn the skin.</li>
<li>The Tupi name acajú means “the nut that produces itself,” a reference to the way the seed grows openly on the outside of the fruit rather than hidden within it.</li>
<li>Each cashew apple produces just one cashew, dangling beneath it, which is part of why the nuts are so costly to harvest.</li>
<li>Brazil, the cashew’s birthplace, is no longer a leading exporter; Vietnam, India and Côte d’Ivoire now grow the great majority of the world’s crop.</li>
<li>The cashew apple, rich in vitamin C, is widely drunk as juice across Brazil and India but is almost never seen in Europe or North America because it bruises and ferments within a day of picking.</li>
</ul>
<h2 id="a-closing-reflection">A closing reflection</h2>
<p>There is a quiet irony in the cashew’s place in the snack bowl. We treat it as the most casual of foods — a thing to grab by the handful — when it is in fact among the most demanding to bring to the table, native to one continent yet grown on two others, and protected by the same toxin that ruins a hiker’s afternoon. A day in its honour is worth keeping if only as a reminder that “humble” and “effortless” are not the same word, and that the easiest things to eat are not always the easiest things to make.</p>
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