This American invention was developed in 1872 in New York state. Cream cheese is similar to French Neufchatel in that it is made from cow's milk, but differs in that it is unripened and often contains emulsifiers to lend firmness and lengthen shelf-life. USDA law requires standard cream cheese must contain at least 33 percent fat and no more than 55 percent water, although there are low-fat and nonfat varieties now on the market.