Step 1

Preheat the oven to broil with a rack in the upper third. Line a baking sheet with foil and spray it lightly with cooking spray.

Step 2

Spread butter over one side of each piece of bread. Place 5 slices of bread, buttered sides down, in an even layer on the prepared baking sheet. Place a slice of cheese on each piece of bread. Arrange any add-ins you’re using over the cheese. Top each sandwich with another piece of cheese (if you like it extra cheesy, opt for 2 slices on top), followed by the remaining slices of bread, buttered sides up. Press down on each sandwich lightly.

Step 3

Broil the sandwiches on the prepared rack, rotating the pan halfway through, until they’re golden and toasted, about 3 minutes. Remove the pan from the oven, flip the sandwiches over, then continue broiling until the sandwiches are toasted on the other side, about 2-3 minutes longer.