Preheat the Oven: Preheat to 375°F (190°C) and lightly grease a muffin tin.
Prepare Puff Pastry: On a lightly floured surface, roll out each puff pastry sheet. Brush each with melted butter.
Add Sugar & Cinnamon: Sprinkle granulated sugar evenly over the pastry, adding cinnamon if desired.
Shape the Cruffins: Roll each pastry sheet into a tight log. Cut each log into 4-6 equal pieces. Place each piece into the muffin tin, spiral side up.
Bake: Bake for 20-25 minutes, until the cruffins are golden brown and puffed up.
Cool & Serve: Allow cruffins to cool slightly, then dust with powdered sugar before serving