In a large pot over medium heat, add ground beef and cook for about 5-7 minutes, breaking it apart as it cooks. Continue until the meat is fully browned and no longer pink, then drain excess fat.

Add diced onion to the pot with the cooked beef and sauté for 2-3 minutes until the onions become translucent and fragrant.

Stir in the macaroni, beef broth, Worcestershire sauce, garlic powder, salt, and pepper. Increase the heat and bring the mixture to a boil.

Cover the pot and allow the macaroni to cook for 8-10 minutes, checking occasionally; the pasta should be al dente when done.

Remove the pot from heat and immediately stir in the shredded cheddar cheese until well incorporated.

Dish out the One-Pot Cheeseburger Macaroni while it's still warm, and garnish with chopped parsley, green onions, or crispy bacon bits.