Preheat oven to 375° F. Place the blind-baked crust on a rimmed baking sheet and set aside.
In a large bowl, whisk together the pumpkinpuree, brownsugar and granulatedsugar. Add the all-purpose flour, koshersalt, cinnamon, ginger, nutmeg, and cardamom and whisk until smooth.
Add the whole eggs and eggyolks and whisk until combined. Add the heavycream, bourbon, lemonjuice, and vanillabeanpaste and whisk until smooth. Pour the filling into the blind-baked pie crust.
Bake until the filling is set, about 1 hour and 15 minutes, covering the edges of the crust with aluminum foil or pie crust shield if they brown too quickly.
Transfer the pie dish to the wire rack and let the pie cool completely, about 4 hours, before serving. Cut into slices and serve each with a dollop of whipped cream on top.