bottle fermentation

Bottle fermentation is a method used to produce sparkling wines by inducing a second fermentation within the bottle itself. This process traps carbon dioxide, creating the characteristic bubbles and pressure.

In classic bottle fermentation, also known as méthode champenoise, the wine ages in contact with yeast for one to three years. This extended aging develops complex flavors. After aging, the yeast sediment is removed through a process called riddling (remuage), where bottles are gradually inverted. The sediment is then expelled in a process called disgorging (dégorgement), and a small amount of sweetening dosage is added before the bottle is sealed. This method is crucial for developing the unique character of high-quality sparkling wines.1

While bottle fermentation is primarily associated with wine, a similar concept of bottle-conditioning occurs in some beers, where yeast is added to bottles to create carbonation.2