Blot the pumpkin purée with paper towels to remove extra moisture.
In a bowl, mix the pumpkin purée, brown sugar, cinnamon, pumpkin pie spice, and 4 tablespoons melted butter until smooth.
Unroll the puff pastry on a lightly floured surface. Spread the filling evenly over the pastry, leaving a small border on all four sides.
Starting from one long side, roll the puff pastry up tightly into a log. Place it seam side down.
Freeze the log for 10 to 15 minutes so it slices cleanly.
Preheat the oven to 400°F. Grease a muffin tin with avocado oil spray or butter.
Slice the log into 10 to 12 rolls using unflavored dental floss or a sharp knife. Place each roll swirl side up in the muffin tin.
Beat the egg with a splash of water and brush it over the tops.
Bake for 25 minutes, until puffed and golden.
Mix the sugar and cinnamon in a small bowl.
Let the rolls cool for a few minutes. Brush the tops with 1 to 2 tablespoons melted butter, then dip them in the cinnamon sugar.
Serve warm.