Storage & ReheatingThis will keep in the fridge for up to 3 days in an airtight container. As a cream-based sauce, it can split slightly once frozen and thawed, so it's best kept in the fridge rather than frozen if possible — if you do freeze it, give it a good stir while reheating to bring it back together. Reheat gently in a pan or the microwave with a splash of milk or cream to loosen the sauce back up.