3Bake in preheated oven until flesh is tender throughout, about 40 minutes. Set aside until cool enough to handle.
4Increase oven heat to 425 degrees F (220 degrees C).
5Scrape pumpkin flesh into a large mixing bowl. Add eggs, heavy cream, sour cream, demerara sugar, flour, pumpkin pie spice, and salt; beat until smooth. Pour the pumpkin mixture into pie crusts.
6Bake in the preheated oven until a toothpick inserted into the center comes out clean, about 45 minutes.