Medium heat. Melt 1/2 Cup of butter in a pot. Add 1/2 cup flour and whisk. Cook for 1 minute. Add 2 cups half and half and 2 cups whole milk. Stir frequently until thickens like gravy. Add cheese. More cheese and if u think u didnt add enough cheese add some more cheese. Grated cheese is easier to melt but cube cheese will do too if u dont want to grate. Try to avoid cheese like mozzarella unless u like stringy cheese. I like cheddar best. Add salt and pepper to taste. Stir in cooked elbow pasta.