01 - Spread softened butter evenly on one side of each bread slice, ensuring complete edge-to-edge coverage for even browning.
02 - Place two bread slices buttered side down on a clean surface. Layer two cheese slices on each, then top with remaining bread slices, buttered side facing up.
03 - Preheat a large skillet or griddle over medium heat for 2-3 minutes until properly heated.
04 - Place sandwiches in the hot pan. Cook for 3-4 minutes, pressing gently with a spatula, until the bottom is golden brown and crispy.
05 - Carefully flip sandwiches and cook another 3-4 minutes until the second side is golden brown and cheese is completely melted.
06 - Remove from heat and let rest for 1 minute. Cut into halves or quarters and serve immediately while hot.