If you want your baked macaroni and cheese super creamy, you can skip baking it and just put it under the broiler to brown the top. (Keep a close eye on it.) Then serve.
If you like, you can sprinkle some grated parmesan cheese over the top before baking. YUM!
Find it online: https://www.livingonadime.com/baked-macaroni-and-cheese-recipe/