Instructions:

1. Preheat the oven: Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
2. Prepare the cinnamon sugar mixture: In a small bowl, mix together the granulated sugar and ground cinnamon until well combined.
3. Roll out the puff pastry: On a lightly floured surface, roll out the thawed puff pastry into a rectangle about 1/8 inch thick.
4. Brush with melted butter: Using a pastry brush, evenly brush the melted butter over the entire surface of the puff pastry.
5. Sprinkle with cinnamon sugar: Sprinkle the cinnamon sugar mixture evenly over the melted butter, covering the entire surface of the puff pastry.
6. Cut into strips: Using a sharp knife or a pizza cutter, cut the puff pastry into strips about 1 inch wide.
7. Twist the strips: Take each strip of puff pastry and gently twist it several times to create a spiral shape. Place the twisted strips onto the prepared baking sheet, leaving some space between each twist.
8. Bake: Transfer the baking sheet to the preheated oven and bake the cinnamon twists for 10-12 minutes, or until they are golden brown and puffed up.
9. Cool and serve: Once baked, remove the cinnamon twists from the oven and let them cool slightly on the baking sheet. Serve warm and enjoy!

These puff pastry cinnamon twists are incredibly easy to make and require just four simple ingredients. They are perfect for breakfast, brunch, or as a sweet treat any time of day. Feel free to customize them by adding a drizzle of icing or a sprinkle of chopped nuts before serving.