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Savagnin grapes are made into a dry white wine, which is then left in oak barrels that are never topped up. A film of flor yeast (the voile) grows on the wine and ages it slowly for more than six years before it is bottled in the 62 cl clavelin. Made in 5 steps over 61 years – 111 years. The longest step, keep in bottle, takes 50–100 years (INAO 2022). Saccharomyces cerevisiae and Flor strains of Saccharomyces cerevisiae, which make up most of the voile do most of the fermenting.
No fixed amounts recordedSet by the appellation rules (cahier des charges); there is no recipe beyond the grape, the barrel and the time.
Savagnin grapes · The only grape allowed for the vin jaune mention[cdc-cotes-du-jura]
No added starter for the voile · The rules protect the natural growth of the local yeasts that form the voile[cdc-cotes-du-jura]
Starter: spontaneous (indigenous flor yeasts)
Total time across the recorded steps: 61 years – 111 years
Start
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What changes:Starting material: ripe Savagnin grapes
Step 1 of 5
Harvest ripe Savagnin
Time
Not documented
Temperature
Not documented
Salt
None given
Acidity
Not documented
Which microbes the steps name, step by step
Saccharomyces cerevisiae
Yeasts
Output: ripe Savagnin grapes.
Flavour
Not documented
Texture
Not documented
Colour
Not documented
Microbes at work in this step
Not documented for this step.
Method
Measured measured in a studySet fixed by a specification or tested recipeReported one source reports itTypical a general value, not sourced for this fermentUnconfirmed not yet checked against a source
What makes this one different
Unlike sherry fino, vin jaune is not fortified, and it is not blended through a solera. It stays in one barrel, never topped up, for more than six years under its voile, at least 60 months of that under the film.
The appellation rules describe vin jaune as a Jura speciality of obscure origin, which local makers have bound with strict rules on grape, voile and ageing.
[pham1995] Pham T.T., Guichard E., Schlich P., Charpentier C. 1995, Optimal conditions for the formation of sotolon from alpha-ketobutyric acid in the French Vin Jaune, J Agric Food Chem 43:2616–2619, doi:10.1021/jf00058a012paper