In a large bowl, combine ground beef, breadcrumbs, onion, egg, garlic powder, Worcestershire sauce, pepper, and salt. Mix until evenly combined.
Shape the mixture into 1-inch meatballs and place on a greased baking sheet.
Bake for 20 minutes, or until the meatballs are cooked through.
In a medium saucepan, combine ketchup, grape jelly, brown sugar, and Worcestershire sauce. Stir over medium heat until the mixture is evenly combined and heated through.
Pour the sauce over the cooked meatballs and stir until evenly coated.
Serve hot.
Interesting Facts
Cocktail meatballs are a popular appetizer in the U.S.
The grape jelly in the recipe gives the meatballs a sweet and tangy flavor.