Beat together confectioners' sugar, cream cheese, butter, vanilla and pumpkin pie spice in large mixing bowl at medium speed, 1-2 minutes until fluffy.
Add pumpkin and blend well. Spoon into pie crust.
Chill overnight. Serve with whipped cream as desired.
Makes 8 servings.
Tip: 1/2 teaspoon cinnamon, 1/4 teaspoon nutmeg, 1/8 teaspoon ginger, and 1/8 teaspoon cloves can be substituted for pumpkin pie spice.