01 - Preheat oven to 350°F. Arrange the unbaked 9-inch pie crust in a pie dish; set aside.
02 - In a medium mixing bowl, whisk pumpkin purée, granulated sugar, egg, cinnamon, ginger, nutmeg, salt, heavy cream, and vanilla extract until smooth. Reserve.
03 - In a large bowl, use an electric mixer or whisk to cream softened unsalted butter, brown sugar, and granulated sugar until light and fluffy. Beat in the egg and vanilla extract until incorporated.
04 - In a separate bowl, whisk together all-purpose flour, baking soda, and salt. Add flour mixture to creamed butter mixture, mixing just until combined. Fold in chocolate chips gently.
05 - Pour pumpkin filling evenly into the prepared pie crust. Drop spoonfuls of cookie dough over the pumpkin layer and gently spread to cover most of the surface; cookie dough will expand during baking.
06 - Place pie dish in the oven and bake for 40 to 45 minutes, or until the cookie layer is golden brown and set. Insert a toothpick in the center; it should come out mostly clean.
07 - Transfer to a cooling rack and allow to cool completely before slicing. Serve at room temperature or slightly warm as desired.