I attempted my own homemade version last night and it was really good. Even my hubby enjoyed it, saying it was a good substitute for th pumpkin pie that he's been requesting. I decided to share it with you, to save you $4.50 and my version is lower in fat/calories as well.
Put in blender equal parts pumpkin and vanilla ice cream (double churned) with a splash of lowfat milk, a pinch of salt, a little sugar (depending on your proportions), and generous spices, either pumpkin pie spice or cinnamon and nutmeg (I did 1/2 tsp. cinnamon and 1/8 tsp. nutmeg). Blend until the right consistency, adding milk as necessary. Enjoy.