Heat the butter and flour on medium in a large sauce pan ( I used a smaller one for filming just because it is easier to see into). Cook until brown. In a separate pat heat milk until it's almost a boil. Slowly add the milk into the flour/butter mixture. Slowly add cheeses into mixture. Lastly add your spices and liquid smoke cook on low until nice and creamy.
Mix your Cheese sauce into your noodles... boom! You have just completed the best ever Mac N' Cheese you will EVER Eat!