Preheat your oven to 400°F (200°C).
Roll out the puff pastry on a lightly floured surface.
Cut the pastry into rectangles, about 4x6 inches.
Prepare the filling by mixing pumpkin puree, cream cheese, brown sugar, cinnamon, and nutmeg until smooth.
Spoon the filling onto one side of each pastry rectangle.
Fold the pastry over to create a pocket and seal the edges with a fork.
Twist each sealed pocket several times, then place on a baking sheet lined with parchment paper.
Brush the tops with egg wash to encourage browning.
Bake for 15–20 minutes or until golden brown.
Allow to cool slightly before dusting with powdered sugar and serving.