Brown Ground Beef:
In a large pot, cook the ground beef and diced onion over medium heat until the beef is fully browned and the onion is soft. Drain any excess fat.
Add Beef Broth:
Pour in the beef broth and bring the mixture to a boil.
Cook Macaroni:
Stir in the elbow macaroni, and cook uncovered for about 7-8 minutes, or until the pasta is just al dente.
Add Cheese and Milk:
Lower the heat to medium-low, and stir in the milk and shredded cheddar cheese. Continue stirring until the cheese is completely melted and the soup is creamy.
Season and Serve:
Season the soup with salt and pepper to taste. Ladle into bowls and enjoy!
