Steps
- Preheat the oven to 400°F / 205°C. Mix 680g of cold ground beef with 1¼ teaspoons of kosher salt and ½ teaspoon of garlic powder.
- Add ½ teaspoon of Worcestershire sauce and ¼ teaspoon of black pepper. Form 8 patties 5in / 13cm wide and ¼in / 5mm thick.
- Quarter 4 slices of American cheese and overlap the pieces on half the patties, leaving a ½in / 1cm border. Cover with the other patties and pinch firmly shut.
- Heat 1 tablespoon of vegetable oil in a large skillet over medium heat for 3-4 minutes. Cook the burgers in batches for about 4 minutes per side.
- Continue until the beef reaches 160°F / 71°C, then tent loosely with foil. Split 4 hamburger buns and toast cut-side up in the oven for 4-5 minutes.
- Put the patties in the buns, add sliced pickles, and close.