Prepare the Ingredients: Start by laying out all the ingredients you’ll need. Butter both sides of each slice of bread generously. Make sure the butter is soft to spread easily and evenly.

Assemble the Sandwich: Lay one slice of bread buttered-side-down on a clean surface. Place your cheese slices on top of the bread. Add any optional additions like tomatoes, bacon, or caramelized onions if desired. Top with the second slice of bread, buttered-side-up.

Heat the Pan: Place a skillet or non-stick frying pan over medium heat. Let it warm up for about 2-3 minutes. It’s important that the pan is hot but not too hot, so the bread crisps up without burning.

Grill the Sandwich: Once the pan is ready, place the sandwich in the skillet. Grill for 3-4 minutes on one side until it’s golden brown and crispy. Using a spatula, flip the sandwich carefully and grill the other side for another 3-4 minutes. Keep an eye on it to avoid burning. You can press down lightly on the sandwich with the spatula for even grilling.

Check for Melty Cheese: After both sides are golden and crispy, check to ensure the cheese has melted inside. If not, reduce the heat and cover the pan for 1-2 minutes to help the cheese melt thoroughly.

Serve and Enjoy: Once the sandwich is ready, remove it from the pan, cut it in half (diagonal is always a good choice), and serve immediately with your favorite side like soup or chips.