You can also just melt nearly any cheese into a roux to make a mornay sauce if you are careful about it, which is the secret to both mac and cheese and queso sauce. Sodium citrate helps to keep it from breaking but is not strictly necessary in most cases.
You can also just melt nearly any cheese into a roux to make a mornay sauce if you are careful about it, which is the secret to both mac and cheese and queso sauce. Sodium citrate helps to keep it from breaking but is not strictly necessary in most cases.
Edit - yes, cheese and milk
This sounds fancy, so to make it a bit less daunting:
When making the béchamel sauce, add the milk a very small amout at a time to prevent clumping, and mix well over medium heat between additions.