Here are the steps for preparing and cooking a Whopper sandwich according to Burger King's standard recipe: 1. Begin by gathering all necessary ingredients, including a freshly baked sesame seed bun, 1/4 pound of flame-grilled beef patty, lettuce leaves, sliced tomatoes, mayonnaise, ketchup, and pickles. 2. Place the beef patty on a heat-resistant surface or grill. Cook until it reaches an internal temperature of at least 155°F (68°C). This should take around 3-4 minutes on each side for a medium-well burger. 3. While the patty is cooking, spread mayonnaise onto both top and bottom halves of the sesame seed bun. 4. Once the beef patty has finished cooking, place it onto the bottom half of the bun that already has mayonnaise on it. 5. Add lettuce leaves to the burger, making sure they are evenly distributed across the entire surface area of the patty. 6. Place sliced tomatoes onto the top of the lettuce layer, ensuring that they cover most of the lettuce. 7. Next, add a few pickle slices on top of the tomatoes, distributing them evenly. 8. Top off the burger with the remaining half of the bun, mayonnaise-side down, to complete the Whopper sandwich. 9. Serve immediately and enjoy your freshly made Whopper sandwich!