In a medium bowl, mix butter, parmesan, garlic powder, and Italian seasoning. Mash until smooth.
1/2 cup unsalted butter, 1 tablespoon grated parmesan, 1 teaspoon garlic powder, 1/2 teaspoon dry Italian seasoning.
Spread butter mixture evenly on one side of the bread slices, then place them butter-side up on a sheet tray until use.
8 white bread slices Heat a skillet on medium-low. Place a butter-side-down bread slice in the skillet.
Place one mozzarella on the bread. Another piece of mozzarella, 6 pepperoni, and 1 mozzarella slice. Place another butter-side-up slice of bread on top.
Pepperoni may be leftover. 12-slice mozzarella, 6-ounce pepperoni Cover the skillet to melt the cheese and cook the bread for 3-5 minutes until golden brown. Carefully turn the sandwich.
Add the lid again and heat until the bottom is golden brown and the cheese is melted. Repeat with other sandwiches.
Serve immediately with warm pizza sauce for dipping. Warm pizza sauce for dipping