The nachos sold at concession stands consists of tortilla chips topped with pump-able cheese sauce. The pasta is purchased and prepared separately, then mixed with the heated cheese sauce. Many vendors offer a Chicago-style dog with cheese sauce, known as a cheese-dog. In some fast food chains, these are topped with cheese sauce and minced bacon. The cheese sauce can also be substituted with milk gravy. The sandwich is served with a cheese sauce similar to Welsh rarebit and french fries. A cheese sauce can be added for a small additional charge. Cheez Whiz is a processed cheese sauce or spread sold by Kraft Foods.