The crust is most crisp the day it's made, but the pie without the whipped-cream topping and chocolate shavings can be made up to a day ahead and stored in the refrigerator. To cut the pie into neat slices, use a serrated knife.
You can substitute whiskey, rum, or rye for the bourbon. If you cannot find all-butter puff pastry, you can use other types of puff pastry and bake at 400 degrees. The apple filling can be made a day ahead and stored in the refrigerator; bring to room temperature before using.