1. Heat a skillet over medium heat.
2. Butter one side of each slice of bread.
3. Place one slice of bread, butter side down, on the skillet.
4. Top with one slice of cheese and the other slice of bread, butter side up.
5. Cook until cheese is melted, and bread is golden brown, about 3-4 minutes.
6. Flip the sandwich and cook for an additional 3-4 minutes.