Step 1: In a large bowl, gently combine the ground beef, Worcestershire sauce, garlic powder, onion powder, smoked paprika, black pepper, and salt. If using, add fresh parsley. Be careful not to overmix, as this can make the hamburger meat tough.
Step 2: Divide the hamburger meat mixture into four equal portions. Gently form each portion into a patty about 3/4 to 1 inch thick and slightly wider than your burger bun, as they will shrink during cooking. Create a small indentation in the center of each patty with your thumb to prevent them from bulging in the middle.
Step 3: Prepare your cooking surface. For grilling: Preheat grill to medium-high heat (about 400-450°F / 200-230°C). For pan-frying: Heat a large cast-iron skillet or heavy-bottomed pan over medium-high heat with a tablespoon of olive oil (if using) until shimmering.
Step 4: Place the hamburger meat patties on the hot grill or into the hot skillet. Cook for 3-5 minutes per side for medium-rare (135°F / 57°C internal temperature), 5-6 minutes per side for medium (140°F / 60°C), or 6-7 minutes per side for medium-well (150°F / 66°C). Adjust cooking time based on desired doneness and thickness of your hamburger meat patties.
Step 5: For the last minute or two of cooking, if desired, place a slice of cheese on top of each patty to melt.
Step 6: Remove the cooked hamburger meat patties from the heat and let them rest on a plate for 2-3 minutes before serving. This allows the juices to redistribute, ensuring a juicier burger.
Step 7: Serve your perfectly cooked hamburger meat patties on toasted buns with your favorite toppings like lettuce, tomato, onion, pickles, and condiments.