Preheat your oven according to the instructions on your puff pastry package and line a large tray with baking paper.
In a bowl, mix together the pumpkin puree, brown sugar and all of the spices.
Spread the mixture over your puff pastry sheet then roll it up into a log, with the longest side facing you. Use floss or a sharp knife to cut the log into 12 slices.
Place the pinwheels onto your lined baking tray and lightly brush them with the beaten egg.
Bake for 12-15 minutes, or until the pinwheels are golden brown all over.
Transfer them to a wire rack to cool then dust with powdered sugar and enjoy!