Preheat your oven to 350°F (175°C) and spray a muffin tin with nonstick cooking spray.

In a large mixing bowl, combine the ground beef, minced onion, eggs, breadcrumbs, Worcestershire sauce, pepper, seasoning salt, and garlic powder.

Scoop the meat mixture into the prepared muffin tin, filling each cup about three-quarters full.

In a separate bowl, mix the remaining ketchup with brown sugar and mustard, then spoon the glaze over each muffin.

Bake for about 30 minutes or until the tops are browned and internal temperature reaches 160°F (71°C).

Let the muffins cool for about 5 minutes, then transfer to a serving platter.

Store uncooked muffins in the freezer or refrigerate cooked leftovers for quick meals.