Easy peasy. Start with white sauce - equal amount of flour and butter melted together and cooked a few minutes (don't let it brown) add milk and allow to thicken. If too thick add more milk, the add grated cheeses (i used to use old cheddar, swiss and pizzza mozzarella mixed together) until the taste is to your liking. Combine with cooked elbow macaroni and either keep warm or pour into a 9X13" baking pan, top with grated parmesan and bake until the top is browned. Nope, no measurements, I just made in amounts according to what I wanted to have on hand..........now I am lazy and use KD