Cook the noodles in bone broth and water until tender. No need to drain.
In a separate pot, melt butter over medium heat. Whisk in flour to make a roux, then slowly pour in milk, whisking until smooth.
Add garlic powder, onion powder, salt, and plenty of black pepper. Bring to a simmer, then stir in the cheese until melted and creamy.
Add cooked noodles into the cheese sauce, stirring to coat. Let cook on low until thickened. Adjust seasonings as desired—extra black pepper makes it even better.