1. Gather Ingredients: Lay out the bread, cheese, and butter (or mayo).
2. Preheat Pan: Heat a skillet or frying pan over medium-low heat.
3. Butter the Bread: Spread butter (or mayo) on one side of each slice of bread.
4. Assemble the Sandwich: Place the buttered side of one slice face down in the pan, then add the cheese on top.
5. Top with Second Slice: Place the second slice of bread on top, buttered side up.
6. Grill the First Side: Cook for 2-3 minutes until the bottom is golden brown and crispy.
7. Flip the Sandwich: Carefully flip the sandwich using a spatula.
8. Grill the Other Side: Cook for another 2-3 minutes until the other side is golden brown and the cheese is fully melted.
9. Check for Melted Cheese: If the cheese hasn’t melted fully, lower the heat and cook for an additional minute on each side.
10. Serve and Enjoy: Remove from the pan, slice in half, and enjoy your gooey grilled cheese sandwich!