Step 1

Preheat the oven to 400 degrees F.

Step 2

Place a 10-inch cast-iron skillet or a baking sheet on the middle rack of the oven.

Step 3

In a medium bowl, gently mix the beef, Worcestershire sauce, garlic powder, onion, salt, and pepper until just combined.

Step 4

Shape the beef mixture into 4 equal-sized patties, slightly wider than their intended buns (they will shrink slightly during cooking). Press a wide, shallow indent into the center of each patty. This is critical to keeping the patty shape during cooking.

Step 5

Carefully remove the preheated skillet or baking sheet from the oven and place the patties on it.

Step 6

Return the skillet or sheet to the oven and cook the burgers for 4 minutes.

Step 7

Flip the patties and cook to the desired level of doneness, about 2 minutes for rare (135 degrees F), about 4 minutes for medium-rare (140 degrees F), about 5 minutes for medium (145 degrees F), about 6 minutes for medium-well (150 degrees F), and about 8 minutes for well-done (155-160 degrees F). Use a meat thermometer to ensure the beef is cooked to your desired temperature.

Step 8

Serve each burger on the buns with your desired toppings.