Preheat the oven to 350 F and lightly grease a pie pan with nonstick baking spray. Place the pie crust in your greased pan and crimp or flute the edges. Line the pie crust with parchment paper and fill the center with dried beans or pie weights.
Bake the crust for 20 minutes.
In a large bowl, whisk together the remaining ingredients (pumpkin, heavy cream, brown sugar, eggs, pie spice, and vanilla) until smooth. Pour the pumpkin mixture into the par-baked crust and bake for 55-60 minutes, or until the center of the pie barely jiggles when shaken.
Remove the pie from the oven and allow it to cool completely to room temperature. Then transfer it to the fridge and chill for at least 4 hours.
Serve garnished with a dollop of fresh whipped cream and enjoy.