Preheat the oven to 425°F (220°C).
Line a baking sheet with parchment paper or a silicone baking mat.
Lightly flour a clean work surface.
Unroll the pizza dough.
Gently shape it into an even rectangle without significantly increasing its size.
Sprinkle the mozzarella cheese evenly over the dough, leaving about 1 inch uncovered along one long edge.
Arrange the pepperoni slices evenly over the cheese layer.
Starting from the opposite long side, tightly roll the dough into a log.
Pinch the seam closed to seal.
Using a sharp knife, cut the log into 12 equal slices.
Arrange the slices cut-side up on the prepared baking sheet.
Bake for 12–14 minutes or until golden brown and cooked through.
Prepare the Garlic Butter
While the roll ups bake, place the butter in a microwave-safe bowl.
Add the garlic powder and Italian seasoning.
Microwave until melted.
Stir to combine.
Finish the Roll Ups
Remove the pizza roll ups from the oven.
Immediately brush with the garlic butter mixture.
Sprinkle with grated Parmesan cheese.
Serve warm with pizza sauce for dipping.