The Jura's 'yellow wine' — and one of the boldest whites in France. It's dry, made entirely from Savagnin, and aged more than six years in oak barrels that are deliberately never topped up. As the wine evaporates, a film of native yeast called the voile grows across the surface and shields it while it slowly oxidises — the same trick that gives you flor in a fino sherry. What comes out is savoury, nutty and piercing: walnut, toasted almond, curry spice, a bone-dry finish. And it arrives in a bottle you'll know on sight — the stubby 62 cl clavelin, used for no other wine on earth.

Why is Vin Jaune bottled in a smaller bottle?

Because a third of it is gone before you ever see it. The clavelin holds 62 cl, not the usual 75, and that odd number is the whole story: it's roughly what's left of one litre after six-plus years in barrel, once evaporation — the angels' share — has taken its cut. It's the only bottle size in European law reserved for a single wine, and Vin Jaune must be sold in it. The shape became the emblem.

What does Vin Jaune taste like, and does it age?

Think dry oloroso before you think white wine: walnut, toasted almond, green apple, curry powder, saffron and ginger over a bone-dry, high-acid spine. Powerful, long, unmistakable. And it's one of the most age-worthy dry whites on the planet — good bottles run for decades, and century-old examples have been opened in fine shape. Serve it only lightly chilled, and don't hurry: an open bottle holds for days, even weeks.

What is the best appellation for Vin Jaune?

Château-Chalon is the benchmark — a perched hilltop village whose appellation, created in 1936, makes nothing but Vin Jaune and is treated as its grand cru. But don't stop there. Vin Jaune also comes under Côtes du Jura, Arbois and L'Étoile, and that's where most of the value and much of the everyday brilliance sits. Château-Chalon sets the ceiling; the other three are where you actually shop.

Vin Jaune

Most French whites chase freshness caught young. Vin Jaune does the opposite, on purpose.

Here's the gamble: a dry Jura Savagnin goes into old oak and gets left there for more than six years, and the barrel is never topped up. A living film of yeast — the voile — grows across the surface and shields the wine while it slowly turns nutty, savoury and gold. What you pour tastes closer to a fine dry sherry than to any ordinary white: walnut, toasted almond, curry spice, green apple, a bone-dry finish that goes on. It divides a room. The people it wins over tend to stay won.

The trick that makes it yellow

The colour and the character are the same story: what the winemaker doesn't do. Everywhere else, cellars practise ouillage — topping the barrel up to keep air off the wine. For Vin Jaune they refuse, and let the level drop as the wine evaporates. Into that gap grows the veil of native yeast, and it earns its keep: it feeds on the wine, guards it from turning to vinegar, and hands back a deep, oxidative complexity you can't fake. It's the same phenomenon as the flor on a fino. Ageing this way has a name — sous voile, "under veil."

The law demands patience. A minimum of six years and three months in barrel, at least sixty months of it under the voile, nothing added and nothing rushed. The wine either survives the long slow oxidation and comes out extraordinary, or it fails and gets declassified. No safety net. That nerve is the whole point of the style.

Vin Jaune is French wine's great act of nerve: leave the barrel unfilled for six years and trust a film of yeast to do the rest.

Why the bottle is stubby

By the time it's ready, roughly a third of the wine is simply gone — evaporated into the Jura air, the angels' share. That loss is the reason for the most famous quirk in French wine. The clavelin holds 62 cl, not the usual 75, because 62 cl is about what's left of a single litre once the ageing is done. It's the only bottle size in European law reserved for one specific wine, and Vin Jaune may be sold in nothing else. Pick one up: the squat, thick-shouldered shape tells you what you're holding before you've read a word on the label.

Château-Chalon sets the ceiling — shop the others

One name stands above the rest, and it's worth knowing why. Château-Chalon — a fortress village on a rocky spur, one of France's officially "most beautiful" — is the grand cru of Vin Jaune. Its appellation, among the very first French AOCs in 1936, permits only this wine: no red, no Crémant, no ordinary white may carry the name. The blue-grey Liassic marls on that sun-facing slope ripen Savagnin to the exact pitch the wine needs, and in a weak year the whole appellation would rather declassify than release something second-rate. That's the benchmark.

But the benchmark isn't where you spend. Vin Jaune is also made under Arbois, Côtes du Jura and L'Étoile, and that's where much of the everyday brilliance and the better value live — Arbois being the busy wine capital where Pasteur ran his fermentation work on the local vines. The growers to follow are a tight roster of specialists: Domaine Macle and Domaine Berthet-Bondet in Château-Chalon itself, Stéphane Tissot and the historic Domaine Rolet in Arbois, the ancient house of Jean Bourdy, and the enduring shadow of Jacques Puffeney over all of it. The bench keeps deepening. This whole clan — alongside the dried-grape Vin de Paille and the Jura's other curiosities — sits in the France wine styles oddities wing.

Where to taste it — and the one weekend to go

Base yourself in Arbois. It's a working wine town wall-to-wall with cellars, and you can taste Vin Jaune there beside Ploussard reds and Crémant without booking your life away. From there it's a short climb to Château-Chalon — go for the view over the vineyards even if you buy nothing — and on to Poligny and L'Étoile. The Jura itself is the draw and the secret: a quiet mountain region wedged between Burgundy and Switzerland, gloriously under-touristed, its villages strung along a wine route of some eighty kilometres.

Now the timing trick. Aim for the first weekend of February and you land at La Percée du Vin Jaune, the festival that launches the newest vintage. It moves to a different village each year, and its centrepiece is the percée — the ceremonial "piercing" of a barrel that lets a long-aged wine finally meet the public. It's the warmest possible way into a wine that can otherwise read as forbidding, and the single best day to see why the Jurassiens are so proud of it.

At the table

One pairing towers over everything, so start there: Comté, the great nutty mountain cheese made in the same hills, aged until it crystallises. Vin Jaune and old Comté is a regional marriage that borders on the perfect — the wine's savoury oxidation meeting the cheese's brown-butter depth. If you do nothing else, do this.

After that, the power and spice open real doors. The Jura's own dish is poulet au vin jaune aux morilles — chicken and morels in a cream sauce built on the wine itself — and the wine flatters anything in that register: morels, roast poultry, rich white fish. The curry note makes it one of the very few wines that stands up to mild Indian and South-East Asian spice, and a small pour is a serious foil for foie gras. Serve it only lightly chilled, around cellar temperature, so the aromatics aren't muted. And don't feel you must finish it — an opened clavelin will hold, and even improve, for days.

To follow the Jura's oddities back to the rest of the country's blueprints, go up to the France wine styles wing, or step back to the whole France wine guide.