1) You may substitute 2 tsp ground cinnamon, 1/4 tsp ground ginger. 1/4 tsp nutmeg and 1/8 tsp ground clove or Allspice for the pumpkin pie spice. Adjust to your taste.
2) If making to freeze leave off the frosting and wrap tightly in freezer safe wrap. Frost after thawing and just before serving.