My grandmother kept a index card in her recipe box with three words on the front: sweet potato pie. No name, no notes. I finally worked out it was the one her sister Vivian made every November, and the amounts on the back made three pies, not one. That's the version here.
Three pies sounds like a lot until you do the math. Four big sweet potatoes, two sticks of butter and a bag of sugar go into one bowl, and the filling splits neatly between three frozen crusts. You boil the potatoes first, which takes about half an hour, so start those before anything else.
One thing I learned the hard way: let the potatoes cool all the way before you mash them. Hot potatoes steam, and steam makes the filling loose and watery. Give them time on the counter and the texture comes out right.
Step-by-Step Instructions
1. Boil the sweet potatoes
Put the whole sweet potatoes in a big pot and cover them with water. Bring it to a boil and cook until a fork goes in easily, about 25 to 30 minutes. Drain them and let them cool completely.
2. Heat the oven
Set the oven to 365°F (185°C). Move a rack to the middle position so all three pies get even heat.
3. Mash the potatoes
Peel the cooled potatoes and put the flesh in a large bowl. Mash with an electric hand mixer or a fork until no lumps are left.
4. Build the filling
Pour in the melted butter, sugar, nutmeg, cinnamon and salt. Beat until smooth, then scrape the bowl down with a rubber spatula. Crack in the eggs one at a time, mixing after each. Add the self-rising flour, buttermilk, vanilla and lemon extract, then beat once more until everything is combined.
5. Fill the crusts
Spoon the filling into the three frozen crusts, dividing it evenly. Smooth the tops with the back of a spoon.
6. Bake the pies
Bake for about 1 hour, until the centers are set. If the crust edges get dark before the filling is done, cover them with foil. Let the pies cool on a wire rack for 2 hours.
7. Slice and serve
Cut into wedges once the pies are fully cool. Serve plain or with a spoon of whipped cream.
Variations
Roasted potatoes
bake the sweet potatoes at 400°F for about 50 minutes instead of boiling. The flavor is deeper, but plan the extra time.
Single pie
cut every ingredient to one third and bake one pie. Watch it closely, since a single pie can set faster than three.
Lighter spice
drop the nutmeg to half a teaspoon if you like a gentler flavor.
Pro Tips
How to Store Aunt Vivian’s Sweet Potato Pie
Refrigerator
Cover the pie and keep it in the fridge for up to 4 days. Let slices sit out 20 minutes before serving so the filling softens.
Freezer
Wrap whole pies or individual slices tightly and freeze for up to 2 months. Thaw overnight in the fridge.
Reheating
Warm slices at 300°F for 10 to 12 minutes, or eat them cold. A microwave works too, 20 to 30 seconds per slice.
Frequently Asked Questions
Q: Can I make this with canned sweet potato?
Yes. You need about 4 cups of mashed sweet potato, which is roughly three 15-ounce cans, drained well. The filling will be a little looser, so expect the pies to need the full hour.
Q: Why did my filling turn out watery?
Usually it's potatoes that were mashed while still warm, or not drained long enough after boiling. Let them cool fully and let them sit in a colander a few minutes before mashing.
Q: How do I know the pie is done?
The center should look set with only a small wobble when you nudge the pan. A wet ripple means it needs more time. The pies also firm up as they cool for 2 hours.
Q: Do I have to use frozen crusts?
No, but use unbaked ones. A par-baked or fully baked crust will overcook during the hour in the oven.
Q: Can I halve the recipe?
You can, but the amounts don't split cleanly. The easiest path is to make all three pies and freeze what you don't eat.

Aunt Vivian's Sweet Potato Pie – Classic Southern Dessert
A smooth, spiced sweet potato filling in a flaky crust, baked low and slow until just set. This old-fashioned Southern pie makes three whole pies at once.
Ingredients
Instructions
- 1Boil the sweet potatoes — Put the whole sweet potatoes in a big pot and cover them with water. Bring it to a boil and cook until a fork goes in easily, about 25 to 30 minutes. Drain them and let them cool completely.
- 2Heat the oven — Set the oven to 365°F (185°C). Move a rack to the middle position so all three pies get even heat.
- 3Mash the potatoes — Peel the cooled potatoes and put the flesh in a large bowl. Mash with an electric hand mixer or a fork until no lumps are left.
- 4Build the filling — Pour in the melted butter, sugar, nutmeg, cinnamon and salt. Beat until smooth, then scrape the bowl down with a rubber spatula. Crack in the eggs one at a time, mixing after each. Add the self-rising flour, buttermilk, vanilla and lemon extract, then beat once more until everything is combined.
- 5Fill the crusts — Spoon the filling into the three frozen crusts, dividing it evenly. Smooth the tops with the back of a spoon.
- 6Bake the pies — Bake for about 1 hour, until the centers are set. If the crust edges get dark before the filling is done, cover them with foil. Let the pies cool on a wire rack for 2 hours.
- 7Slice and serve — Cut into wedges once the pies are fully cool. Serve plain or with a spoon of whipped cream.




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