It’s an iron! Think about it; the even heat from an iron is really perfect for grilling sandwiches. And the iron is perfect for pressing down on the sandwich, which is key to fusing the cheese and bread together. Here’s how to do it:
Make your sandwich. I have found that two and a half slices of pre-sliced processed cheese is the perfect amount, although you can certainly slice your own cheese or even use pre-shredded cheese in a pinch, though it won’t melt as well, per Popular Science. Now it’s time to grab your bread slices and assemble the sandwich, then spread softened butter or mayonnaise on the outside of the sandwich. After, you’ll need to wrap it in foil, ensuring that you seal the package well as melted cheese on an iron is a cleaning nightmare.
Then it’s time to iron your sandwich, per Grilled Cheese Social. First, set the iron to the hottest setting, turn the steam option off, put the foil packet on the ironing board, and iron away. Be sure to press down evenly on the sandwich, but not too hard or the cheese will escape. You’ll want to iron for about five to seven minutes on each side (maybe up to ten, according to Instructables), turning the sandwich packet over once or twice.