Preheat your oven to 350°F (175°C).

In a large mixing bowl, combine ground beef, breadcrumbs, chopped onion, milk, ketchup, eggs, Worcestershire sauce, salt, and pepper. Mix until well combined.

Shape the mixture into a loaf and transfer it to a baking dish.

In a separate bowl, whisk together ketchup and brown sugar for the glaze. Spread it generously over the meatloaf.

Bake the meatloaf in the preheated oven for about 1 hour or until the desired level of doneness is achieved.

Let it rest for a few minutes before slicing and serving.