Halfway through the baking process combine the 1 cup gingersnaps and 1 tablespoon melted butter, and sprinkle the crumb mixture over the custard while it is baking by removing the dishes from the oven, adding gingersnap crumb mixture and returning the dishes to the oven to finish baking. If you are using small individual custard dishes check the custard at 20-25 minutes. Allow the custard to cool to room temperature.
5Just before serving mix the pumpkin pie spice-infused whipped cream by whisking together the 1 cup whipping cream, 1 tablespoon granulated sugar, and 1/4 teaspoon pumpkin pie spice until the whipped cream is thickened.