Nacho cheese sauce can be frozen after use and thawed at a later date to be used again. If preserved in this fashion, it can be kept and consumed for a 6-month period.
The most efficient way to freeze nacho cheese sauce is by placing the sauce into an airtight container and storing it on a shelf within the freezer. It is important to thaw the sauce a day before using it again by placing it in the refrigerator for several hours. When defrosted, the sauce may take on a different appearance in color as the freezing process can cause the oils to separate. To fix this, reheat the cheese in the microwave and stir it well.