Our Favorite Macaroni and Cheese

Preheat oven to 350 degrees
3 cups macaroni drained (cook according to directions)
1/2 cup butter
1/2 cup flour
2 cups milk (we like to add a little more liquid)
4 cups (1 pd.) shredded cheddar cheese (I use what I have, but sharp cheddar is what is called for)
Optional-1 can mild rotel
Salt to taste

Melt butter over low heat. Whisk in flour, stir until bubbly, stir in milk. Heat to a boil. STIR, STIR, STIR. Mix in cheese until melted. Stir in cooked macaroni.

Pour into a 9X13 casserole. Bake until bubbly. Can be made ahead and bake just before serving.