Cheese ripening the cheese by fungi to occur. Mould-ripened cheeses ripen faster than hard cheeses, in weeks as opposed to the typical months or even years. This is because the fungi used are more biochemically active than the starter bacteria. Where the ripening occurs is largely dependent on the type of cheese: some cheeses are surface-ripened by moulds, such as Camembert and Brie; and some are ripened internally, such as Stilton. Surface ripening of some cheeses, such as Saint-Nectaire cheese, may also be influenced by yeasts which contribute flavour and coat texture. Others are allowed by the cheesemaker to develop bacterial surface
American cheese "American cheese food" and "American cheese product") are much more like Velveeta or Cheez Whiz. The taste and texture of different varieties of American cheese vary considerably. Depending on the food manufacturer, the color of the cheese (orange, yellow, or white) may indicate different ingredients or processes. Typically, yellow to orange American cheese is made with cheeses (such as Cheddar or Colby cheese) that are seasoned with annatto, while white American cheese is made with cheeses (such as White Cheddar or Jack cheese) which do not contain annatto. The processed variety of American cheese is sold in three basic packaging