01 -
Generously spread the softened butter on all sides of both bread slices, making sure to coat the edges too for maximum crispiness.
02 -
Heat a skillet over medium heat until warm. Place both buttered bread slices in the pan and toast until golden brown and crispy on both sides.
03 -
Sprinkle the grated cheddar and mozzarella over one slice of the toasted bread. Top with the second slice, press gently, and continue cooking, flipping occasionally, until the cheese is completely melted and oozing slightly.