Making yogurt sous vide provides unparalleled temperature control for both pasteurization and fermentation. The two-step process—first heating milk to 180°F / 82°C to pasteurize and denature proteins, then cooling to 110°F / 43°C for fermentation—ensures consistent, creamy results that are difficult to achieve with traditional methods. The water bath maintains the perfect incubation temperature for hours, creating thick, tangy yogurt every time.