Storage & ReheatingThis will keep in the fridge for up to 3 days in an airtight container. As a cream cheese and parmesan-based sauce, it can split slightly once frozen and thawed, so it's best kept in the fridge rather than frozen if possible. Reheat gently in the oven at 180°C (350°F) until hot through, or in the microwave with a splash of milk to loosen the sauce back up.