Roll out the pie dough. Preheat the oven to 350oF. On a floured work surface, roll out the disc of chilled dough. Turn the dough a quarter turn after every few rolls until you have a circle 12 inches in diameter. Carefully place the dough into a 9” pie dish. Tuck it in with your fingers, making sure it is smooth. Trim the excess, leaving about a 1 inch overhang. Fold the excess pie dough underneath, crimping the edges. 1 single pie crust
Blind bake the crust. Roll out the pie dough, into a 12” circle and shape into a prepared pie plate. Line the crust with parchment paper and fill with pie weights. Bake for 15 minutes. Remove the pie weights, and dock the crust with a fork. Return to the oven and continue baking for an additional 10 minutes. Increase the oven temperature to 425°F.
Make the filling. Combine the brown sugar, vanilla, salt, pumpkin pie spice, cinnamon, eggs, pumpkin puree, and heavy cream and whisk together until smooth and combined. Pour the custard into the par-baked crust. ¾ cup (160 g) packed light brown sugar 1 teaspoon vanilla extract ½ teaspoon salt 2 teaspoons pumpkin pie spice 1 teaspoon cinnamon 2 large eggs 15 ounces pumpkin puree 1 cups (240 ml) heavy cream
Bake the pie. Place the pie onto a large baking sheet and bake for 15 minutes. Reduce the oven temperature to 350°F for 40 minutes longer, until the edges are set and the internal temperature registers 175°F.
Cool the pie. Allow the pie to cool for 4 full hours at room temperature before serving. This time allows the filling to thicken up. Serve with vanilla ice cream if desired. Cover pie leftovers tightly and store in the refrigerator for up to 5 days.