Non-stick pan or Cast Iron Griddle if you're going old school
Lay out your bread, top with cheese, top with another piece of bread, then spread top with butter. Once the pan has been preheated to med-high, carefully put your sandwiches in the pan butter side down.
Butter the tops of the sandwiches and wait for the bottoms to turn golden brown before flipping them over.
Serve grilled cheese as is or with the standard accompaniment of a steaming bowl of tomato soup.