Adding milk or cream directly to the water bath in a sous vide setup is not recommended as it can affect the water's temperature and potentially contaminate the equipment. However, you can add dairy directly to the egg mixture inside the vacuum-sealed bag or jar.
The sous vide method relies on precise temperature control of the water bath to cook food evenly. Introducing milk or cream directly into the water bath can alter its thermal properties, making it harder to maintain a consistent temperature. Furthermore, dairy products can create a breeding ground for bacteria if they leak into the water bath, posing a food safety risk and potentially damaging your sous vide equipment.
Instead, if you want to incorporate milk or cream into your sous vide egg preparation, add it directly to the egg mixture inside the vacuum-sealed bag or jar before cooking. This allows the dairy to cook along with the eggs, infusing them with flavor and richness without compromising the integrity of the water bath. Ensure the bag or jar is properly sealed to prevent any leakage during the cooking process.
When adding dairy to your sous vide egg mixture, use pasteurized products to minimize the risk of bacterial contamination, even within the sealed environment.