Creating the classic patty melt is straightforward and can be achieved by following these clear steps:

1. Prepare Ingredients: Gather all your ingredients and slice the onions and bread.
2. Cook Onions: In a skillet over medium heat, melt 1 tablespoon of butter. Add the sliced onions and cook for about 10-15 minutes, stirring occasionally until they are caramelized. Season with salt and pepper, then remove them from the skillet and set aside.
3. Shape Patties: In a mixing bowl, season the ground beef with salt and pepper. Divide the beef into equal portions and shape them into patties, slightly larger than your bread slices.
4. Cook Patties: In the same skillet, add the patties and cook for about 4-5 minutes on one side. Flip the patties and add cheese slices on top. Cook for another 3-4 minutes until the cheese has melted and the patties reach desired doneness. Remove and set aside.
5. Assemble Melt: In the same skillet, add the remaining tablespoon of butter. Place two slices of bread in the skillet and layer the patties and caramelized onions on top. Add the other two slices of bread to create the sandwich.
6. Cook Sandwich: Grill the sandwich for about 3-4 minutes on each side until golden brown and crispy.
7. Slice and Serve: Once cooked, remove from the skillet. Slice the melt in half and serve with optional pickles or mustard on the side.

Following these steps will guide you to an incredible classic patty melt, ensuring each component is cooked to perfection.