In a large bowl, add the brown sugar, spices, flour, and salt, and whisk them together to break up any clumps. 150 g soft brown sugar, 1 Tablespoon all-purpose flour, 1 teaspoon ground cinnamon, 1/2 teaspoon ground ginger, 1/2 teaspoon salt, 1/4 teaspoon ground cloves, 1/4 teaspoon nutmeg, 1/4 teaspoon black pepper
Add in the pumpkin puree, heavy cream, eggs, orange zest and vanilla and whisk it until smooth. Pour the filling into the par-baked pie crust. 425 g pure pumpkin puree, 180 g heavy cream, 1 Tablespoon orange zest , 2 large eggs, 1 large egg yolk, 1 teaspoon vanilla paste
Bake the pie at 340°F/170°C for approximately 45-50 minutes, until the filling is set around the edges but the center of the pie still has a slight wobble, similar to jelly.
Turn off the oven and open the door a tiny bit to release the heat. Let the pie cool in the oven for an hour.
Remove the pie from the oven and let it cool to room temperature. Refrigerate the pie until you're ready to serve it.