01 -
Combine softened unsalted butter, grated parmesan cheese, Italian seasoning, garlic powder, and salt in a small mixing bowl until evenly blended.
02 -
Spread a thin layer of pizza sauce or marinara sauce on 4 slices of bread. Evenly top each with shredded mozzarella cheese and 6 slices of pepperoni. Place the remaining bread slices on top to form sandwiches.
03 -
Generously spread the prepared garlic butter over the outer sides of each assembled sandwich.
04 -
Heat a skillet over medium heat. Grill the sandwiches for 3–4 minutes per side until the bread is golden and crisp and the cheese is melted.
05 -
Slice grilled sandwiches in half and serve immediately with extra warm marinara sauce for dipping, if desired.