Generoso wines are defined by the Regulations of the Consejo Regulador as dry wines (with a maximum residual sugar quantity of five grams per litre) produced from the total fermentation of must, usually produced from palomino grapes, at the end of which process a film of yeast known as "flor" appears upon the surface of the base wine.
The decision of the bodeguero to fortify the alcoholic strength of base wine to either 15 or 17 % volume determines the type of ageing which the wine will later undergo. From this point on appear the different types of Vinos Generosos.