Preheat oven to 350 degree. Combine pumpkin puree, sugar and pumpkin pie spice in a bowl. Unroll the tube of store bought cinnamon rolls until flat. Spread a layer (not too thick but not too thin) of the pumpkin filling onto the cinnamon rolls. Re-roll the cinnamon roll into a spiral and nestle tightly into a pan. Bake in an oven for 15 minutes. Allow to cool for 5 minutes before topping with icing packet from the tube. Serve warm.