When making cheeseburgers (btw, always use 80/20 chopped meat for the best results), if you like your cheese really melty, when your burgers are done the way you like them, top them with the cheese of your choice, drop a tablespoon of water into the pan and cover immediately. The resulting steam will melt the cheese in seconds, and you’ll have the perfect super-melty cheeseburger. Just top it with some caramelized onions, and you’ll be in cheeseburger paradise!