In a large bowl, combine ground beef, onion, breadcrumbs, 1/3 cup ketchup, Worcestershire sauce, garlic powder, salt, and pepper. Mix well with your hands.
Shape mixture into a loaf and place in an ungreased 9x5-inch loaf pan.
Bake for 40 minutes or until cooked through.
Meanwhile, in a small saucepan, bring beef broth to a boil. Reduce heat and add flour, stirring constantly. Cook until thickened.
Add 1/4 cup ketchup and mix well.
Pour gravy over meatloaf and bake for 5 more minutes.
Remove from oven and let sit for 10 minutes before slicing.
Interesting Facts
Meatloaf is believed to have originated in Germany in the Middle Ages.
It is often served with mashed potatoes and vegetables.
In the United States, it is a popular comfort food dish.