01 -
Stir together the softened butter, grated Parmesan, garlic powder, and Italian seasoning until smooth.
02 -
Coat one side of every slice of bread with the butter mix.
03 -
Start with a bread slice (buttered side down), layer mozzarella, pepperoni, more mozzarella, and finish with bread (buttered side up).
04 -
Warm a skillet over medium heat, cook each sandwich on both sides until the bread is golden and the cheese has melted.
05 -
Serve hot with pizza-flavored dipping sauce on the side.