Heat oven to 375°F. Line 2 large cookie sheets with cooking parchment paper.
Unroll dough; separate into 12 breadsticks. Roll each breadstick into 12-inch rope. Tie ends of each rope into a knot so each breadstick looks like a bone. Place on cookie sheets. Brush each breadstick with butter. Top with Parmesan cheese.
Bake 12 to 14 minutes or until golden brown.
Serve with warmed marinara sauce.