
Malolactic fermentation is often associated with red wines and some Chardonnays. Specifically “buttery” Chardonnay. But what is it?
As the name implies it is a form of fermentation. Unlike a yeast fermentation, however, during malolactic fermentation no alcohol is produced.
Instead malic acid is converted into lactic acid by lactic acid bacteria. Clever name I know.


Up to this point the two batches of Riesling have been fermenting separately. One in a primary fermentation bucket and the other in a six gallon carboy. Little could be observed of the two wines.
Yeast can have a profound affect on the final flavor and aroma profiles of a wine or so we’re told. But how much of a difference is there really from one yeast to another? To answer this question I set up the Great Riesling Yeast Experiment.
Yeast, a winemaker’s best friend, and star of the show when it comes to fermenting grapes into wine. They make it all possible. With a properly hydrated yeast your fermentation will start strong and be less likely to get stuck. Which is why it’s critical to understand how to rehydrate yeast.