Tokaj has long been Hungary's most famous botrytized dessert wines and it has been the object of several legal disputes over the use of the of Tokaj in all its different languages and countries, including Alsace, where Tokay had long been used as a synonym for Pinot Gris, and from Friuli, where the prefix Tocai was traditionally given to the Friulano variety. In 2007, Tokaj became a protected name and no other region or country within the EU is allowed to use the name.
Furmint is the main grape in Tokaj, together with Harslevelu and Sárga Muskotály and Aszú in the label indicates wines that have been affected by the Botrytis cinerea that dehydrates the grape, concentrating their sugars and leaving a its characteristic honeysuckle aroma.
The sweetness of Tokaj aszu wines is indicated in "puttonyos", with 2 the driest and 6 the sweetest. A wine of 7 puttonyos, known as Aszú Essencia, is only produced in the very best years making it incredibly sweet and one of the greatest dessert wines in the world.