I don't use a recipe when I make it. I just boil the elbows (or other pasta) al dente, then I make a rue (sp?) with butter and flour in a saucepan, add milk (I think about 2 - 3 cups??? but I don't measure) about a half cup at a time until desired consistency, and then add shredded cheese (usually a mixture of cheddar, gouda, and mozzarella - maybe a pound total???? no idea at all b/c again, I don't measure, I taste) and stir until melted. Then I pour it over the pasta, which I have placed in a casserole dish and bake. Some people put a breadcrumb crust on top, and I have done that occasionally, but I don't always do it.