5 pounds ground beef chuck (80% lean)
1/4 cup Worcestershire sauce
3 tablespoons olive oil
3 tablespoons grated Parmesan cheese
2 teaspoons garlic powder
2 teaspoons salt
2 teaspoons ground black pepper
1 teaspoon onion powder
Preheat grill for medium heat and lightly oil the grate.
Mix ground beef, eggs, Worcestershire sauce, olive oil, Parmesan cheese, garlic powder, salt, pepper, and onion powder together in a large bowl. Divide into 15 portions, roll into balls, and flatten into patties about 1/2-inch thick.
Cook on the preheated grill until the burgers are cooked to your desired degree of doneness, 6 to 8 minutes per side for well done. An instant-read thermometer inserted into the center should read 160 degrees F (70 degrees C).