Steakhouse Burgers

Name: Steakhouse Burgers
Prep time: 15 min
Cook time: 10 min
Total time: 25 min
Yield: 8
Ingredients: 2 pieces white sandwich bread, crusts removed and cut into ¼-inch pieces; ⅓ cup milk; 2½ teaspoons kosher salt; 1 teaspoon freshly ground black pepper; 3 garlic cloves, minced; 1½ tablespoons Worcestershire sauce; 2 tablespoons ketchup; 3 pounds 80 to 85% lean ground beef; 3 scallions, white and green parts, very finely sliced (optional); 8 hamburger buns