01 -
Mix unsalted butter, Parmesan cheese, garlic powder, and Italian seasoning until well combined.
02 -
Spread the garlic butter mixture on one side of each slice of bread.
03 -
Lay one slice of bread butter-side down, add a slice of mozzarella, a layer of pepperoni, another slice of mozzarella, and top with another slice of bread butter-side up.
04 -
Heat a skillet over medium-low heat and cook sandwiches, flipping once, until golden brown and the cheese is melted.
05 -
Serve the sandwiches warm with pizza sauce for dipping.