Preheat oven to 350°.
Lay out Hawaiian rolls on a baking sheet and slice in half horizontally.
Lift off the top portion and set aside.
Spread the buffalo chicken dip over the bottom portion of the rolls.
Sprinkle with cheddar cheese.
Replace the tops of the rolls.
Brush with melted butter.
Bake for 10-15 minutes or until cheese is melted and the tops are a slight golden brown.