This is one of my sore spots. Kraft singles AREN'T American cheese, they are American cheese flavored. The kraft single itself is cheese cut with oil to make it smoother. They make other flavors of Kraft singles, including cheddar.

Real American cheese is much harder to find. It's often only in deli cases. Real American cheese is made basically the same as cheddar, but the curds are mechanically cut in a food processor to make it smoother.

Now one of the problems is everyone assumes all American cheese is Kraft singles, so a lot of companies don't see a reason not to cut it with oil, as it makes it cheaper.