Macaroni and Cheese (Slow Cooker - Paula Deen)

Cook the pasta in a 2-liter saucepan in plenty of water until tender, about 7 minutes. Drain the water. In a medium saucepan, combine the butter and cheese. Stir until the cheese is melted.In a slow cooker, mix the cheese and butter mixture, add sour cream, broth, salt, milk, mustard and pepper and mix well. Then add the pasta, dried, and mix again. Turn the slow cooker on high and cook for 3 hours, stirring occasionally.