01 -
In a mixing bowl, combine softened unsalted butter with grated Parmesan cheese, garlic powder, and Italian seasoning until evenly blended.
02 -
Evenly spread the prepared butter mixture on one side of each bread slice.
03 -
Heat a skillet over medium-low. Place one slice of bread, buttered side down, onto the skillet surface.
04 -
Arrange 1 mozzarella slice on bread, top with 6 pepperoni slices, add a second mozzarella slice, another 6 pepperoni slices, and finish with remaining mozzarella slice.
05 -
Top sandwich with the second bread slice, buttered side facing up. Grill for 3 to 5 minutes per side, pressing gently, until bread is golden and cheese fully melted.
06 -
Cut sandwich as desired and serve immediately accompanied by warm pizza sauce for dipping.