Divide the 1 lb ground beef into 4 equal portions (about 4 ounces/113 g each). Gently form each portion into a round patty about 3.5–4 inches (9–10 cm) across and roughly 3/4 inch (2 cm) thick. Do not overwork the meat. Make a shallow dimple in the center of each patty with your thumb to help them cook flat.

Season

Lightly brush or rub each side of the patties with the neutral oil. Sprinkle kosher salt (about 1/4 tsp per side) and freshly ground black pepper evenly over both sides. If using Worcestershire sauce, brush about 1/4 tsp on each patty or fold 1 tsp into the meat before forming (optional).

Cook patties

Heat a large skillet or cast-iron pan over medium-high heat until very hot, about 3–4 minutes. Add a thin film of oil. Place patties into the pan leaving space between them. Cook without moving for 3–4 minutes until a brown crust forms. Flip once and cook 2–3 minutes for medium, or until internal temperature reaches 160°F (71°C) for well-done per USDA guidance. If using cheese, place a slice on each patty during the last 30–60 seconds and cover the pan to melt.

Transfer cooked patties to a plate and tent loosely with foil to rest for 2–3 minutes while you prepare buns and assemble.

Toppings & assembly

Prepare vegetables

While patties cook, slice the tomato into 1/4-inch (6 mm) rounds. Thinly slice the red onion into rings. Wash and dry lettuce leaves. Set out pickle slices.

Toast buns

Spread the softened butter evenly on the cut sides of the 4 hamburger buns. Place buns butter-side down on a separate skillet set over medium heat or on the same pan after patties are removed. Toast until golden and fragrant, about 1–2 minutes. Remove from heat.

Assemble burgers

On the bottom bun, spread 1 tsp mayonnaise. Add a lettuce leaf, then a cooked beef patty with melted cheese. Top the patty with 2 pickle slices, a tomato slice, and a few red onion rings. Drizzle 1 tsp ketchup and 1 tsp mustard over the tomato or spread on the top bun, as preferred. Place the top bun on the burger.

Serve

Serve immediately while hot, with optional sides such as fries, chips, or a small salad. Leftover patties can be refrigerated and eaten within 2 days.