Preheat the oven to 375 degrees F. Line a baking sheet with parchment paper, set aside.
Separate the 8 crescent rolls and lay them on a plate, set aside.
Melt 2 TBS butter in a small bowl and set asdie.
Mix together the sugar and cinnamon in a small bowl.
Dip one marshmallow in butter, turning to coat it completely.
Roll the butter-dipped marshmallow in the cinnamon sugar mixture until coated.
Put the marshmallow inside a crescent roll and make sure you seal it completely! Do not leave any holes or openings. Set it on the prepared baking sheet.
Repeat with remaining marshmallows and rolls.
Bake in preheated oven for 9-12 minutes until golden brown.
Serve warm and enjoy!