Preheat the Oven: Preheat your oven to 375°F (190°C) and lightly grease a Bundt pan or baking dish.
Prepare the Dough: Cut the pizza or biscuit dough into 1-inch pieces.
Assemble the Filling: In a large bowl, toss the dough pieces with shredded mozzarella, mini pepperoni, garlic powder, Italian seasoning, and red pepper flakes (if using). Mix until evenly combined.
Layer the Bread: Place the seasoned dough mixture into the prepared pan, layering as you go. Sprinkle Parmesan cheese over the top.
Add Butter: Drizzle melted butter evenly over the dough to enhance the flavor and create a golden crust.
Bake: Bake in the preheated oven for 30–35 minutes, or until the bread is golden brown and cooked through.
Cool and Serve: Allow the bread to cool in the pan for 5 minutes before inverting onto a serving plate. Serve warm with marinara sauce on the side for dipping.