Custardy and classic, this easy pie shows off the earthy richness of sweet potatoes with a little butter and a blend of warming spices. Be sure to start with good-looking spuds—firm and speckle-free. As they bake, they'll caramelize a bit. Because sweet potatoes vary in sweetness, I have you taste the filling before beating in the eggs to see if you want a touch more sugar.
Put the sweet potatoes on a foil-lined half-sheet pan. Bake, turning once, until very tender, 1 1/2 to 2 hours. When cool enough to handle, take the sweet potatoes out of their jackets and scrape the flesh into a 1-quart measuring cup. You should have 2 1/2 cups packed sweet potato.
Raise the oven temperature to 425 degrees F.
Line the frozen dough with foil and fill with pie weights. Bake until dry and set, about 25 minutes. Remove the foil with the weights and bake the dough until golden brown, about 5 minutes longer. Let cool completely, then place on a half-sheet pan.
Transfer the sweet potato to a large bowl and add the cinnamon, ginger, allspice, nutmeg, salt, butter, brown sugar, and the evaporated milk. Beat with a heavy whisk until smooth. Taste and add more brown sugar if you'd like. The amount will depend on the sweetness of your spuds. Add the eggs and whisk until fully incorporated. Pour into the pie crust and spread evenly.
Bake for 15 minutes, then reduce the oven temperature to 350 degrees F. Bake until the top is golden brown and the filling has puffed and set, about 40 minutes. If the crust browns too quickly, cover it with foil and continue baking. Let cool completely on a wire rack.
Carla's Classic Pie Dough:
Yield:Two 9-inch crusts
Dissolve the sugar and salt in 1/3 cup water and chill until cold.
Pulse the flour and butter in a stand mixer until the mixture looks like coarse meal with some pea-size pieces. Add the water all at once and mix until the dough almost forms a ball. Divide the dough in half and flatten into two disks.
Wrap each disk tightly in plastic wrap and chill until firm, at least 30 minutes or up to 3 days. You can freeze the dough for up to 3 months. Thaw overnight in the refrigerator before rolling.
The unbaked crust can be frozen for up to 1 month. The sweet potatoes can be baked, mashed, and refrigerated for up to 3 days.