Preheat the oven to 375˚F. Line a baking sheet with parchment paper or a silicone baking mat. Set aside.
In a small bowl, mix together the brown sugar and cinnamon.
Roll out the crescent rolls onto the baking sheet, separating them into 8 triangles.
Brush each of the triangles with butter. Sprinkle the cinnamon sugar mixture on top.
Place an apple piece at the base of the triangle, and roll to form the crescent rolls.
Bake in the preheated oven for 12-14 minutes, or until the tops are brown.