

American cheese is just mild cheddar and colby jack, with an emulsifier added to help it blend together and melt smoothly. You can literally make bootleg American cheese by shredding the two together, adding an emulsifier (like sodium citrate) and heating until they melt.
That same emulsifier is what makes it so good for burgers. Aged cheddar tends to melt into clumps, and tends to get greasy as the milk fat separates out of the solids. The emulsifier helps the cheese solids and oils stay together, making it less clumpy and greasy.








Yup. Some brands may mix other cheeses in for taste, but it’s basically just those two cheeses and an emulsifier. A little bit of butter may help them melt more smoothly too, but it depends on how dry the cheddar is to begin with. Younger cheddars will melt easier, and may not need butter at all.