In a large mixing bowl, combine the ground beef, bread crumbs, salt, garlic powder, smoked paprika, pepper, eggs, milk, 2 Tablespoons of the bbq sauce, and the sauteed onions. Use clean hands or a large spoon to squish everything together until combined.
2 pounds lean ground beef, 3/4 cup Italian style panko bread crumbs, 1 1/2 teaspoons coarse kosher salt, 1 teaspoon garlic powder, 1 teaspoon smoked paprika, 1/2 teaspoon black pepper, 2 large eggs, 1/4 cup milk, 1/2 cup bbq sauce