Brettanomyces [Breht-tan-uh-my-sees] Brettanomyces (or “Brett” if you want to sound like you know what you’re talking about) is a yeast that is found on grape skins, in barrels and in the winery itself. Brett can be found mainly in red wines, as the color is extracted from the skins of grapes during red wine fermentation, although Brett can and does occur in white wines, and can sometimes be attributed to sloppy (unhygienic) winemaking. Brett is…