Allspice joins cinnamon, ginger and nutmeg in creating the flavorful profile of this classic dessert.
Preheat your oven to 425 F.2.
In a large bowl, using a standing or handheld mixer, beat the mashed sweet potatoes together with the brown sugar, condensed milk, butter, flour, spices, salt, eggs and vanilla until blended and smooth.3.
Pour filling into the pie shell. It will be full but should not spill over the sides. Bake for 15 minutes, then reduce heat to 350 F and bake until the top is puffed and browned, 20 to 30 minutes more. Cool on a wire rack for at least 2 hours. Serve with whipped cream.