Cut each of the biscuits into 4 equal pieces and place them in a large bowl. Pour in the melted butter, garlic powder, parsley, pepperoni pieces and mozzarella cheese. Toss to evenly combine.
Divide the mixture among a lightly greased 12 muffin cups for medium sized rolls, or 9 muffin cups for larger rolls.
Bake for 10 to 12 minutes or until golden brown.
Enjoy warm with a side of marinara sauce for dipping if desired.