Buttermilk Sweet Potato Pie

Buttermilk Sweet Potato Pie is a medium Southern American recipe that serves 8. 350 calories per serving. Recipe by OLD SCHOOL SOUL FOOD on YouTube.

Prep: 30 min | Cook: 1 hr 40 min | Total: 2 hrs 25 min

Cost: $7.40 total, $0.93 per serving

Ingredients

  • 2 large Roasted sweet potatoes (peeled and mashed; about 2 pounds total)
  • 2 large Eggs (room temperature)
  • 1/4 cup Unsalted butter (melted or softened)
  • 1 cup Granulated sugar (adjust to taste after tasting the filling)
  • 1 tsp Ground cinnamon
  • 1/2 tsp Ground nutmeg
  • 1 tsp Vanilla extract
  • 1 cup Buttermilk (cold)
  • 1 shell Pre‑made 9‑inch deep‑dish pie shells (store‑bought, unbaked)

Instructions

  1. Roast the sweet potatoes

    Preheat the oven to 425°F. Scrub the sweet potatoes, place them on a baking sheet, and roast until tender and lightly caramelized, about 45 minutes. Let them cool enough to handle.

    Time: PT45M

    Temperature: 425°F

  2. Peel and mash

    When the potatoes are cool enough to handle, peel off the skins and mash the flesh in a large bowl until smooth.

    Time: PT10M

  3. Mix wet ingredients

    In a separate bowl, whisk together the buttermilk, eggs, melted butter, sugar, cinnamon, nutmeg, and vanilla until fully combined.

    Time: PT10M

  4. Combine filling

    Add the mashed sweet potatoes to the wet mixture. Stir with a rubber spatula until the batter is uniform. Taste and add a little more sugar if the sweet potatoes are not naturally sweet enough.

    Time: PT5M

  5. Fill the pie shells

    Pour the batter into the pre‑made 9‑inch deep‑dish pie shell, smoothing the top with the spatula.

    Time: PT5M

  6. Initial high‑heat bake

    Place the pie in the oven and bake at 425°F for 15 minutes. This creates a golden crust on the top.

    Time: PT15M

    Temperature: 425°F

  7. Finish baking at lower temperature

    Reduce the oven temperature to 325°F and continue baking for 40 minutes, or until the center is set and a knife inserted comes out clean.

    Time: PT40M

    Temperature: 325°F

  8. Cool completely

    Remove the pie from the oven and let it cool on a rack for at least 4 hours before slicing. The filling will firm up as it cools.

    Time: PT4H

Nutrition Facts

Calories
350
Protein
4 g
Carbohydrates
55 g
Fat
12 g
Fiber
4 g

Dietary info: Vegetarian, Contains gluten, Contains dairy, low-calorie

Allergens: Eggs, Dairy, Wheat (pie crust)

Ingredient Substitutions

  • Instead of Roasted sweet potatoes: Pumpkin puree (for flavor change)
  • Instead of Eggs: Egg replacer, 1/4 cup each
  • Instead of Unsalted butter: Margarine, Coconut oil
  • Instead of Granulated sugar: Brown sugar, Honey (reduce other liquids)
  • Instead of Ground cinnamon: Pumpkin pie spice (use 1 tsp)
  • Instead of Ground nutmeg: Allspice (use 1/2 tsp)
  • Instead of Vanilla extract: Maple extract
  • Instead of Buttermilk: Milk + 1 tbsp lemon juice (let sit 5 min)
  • Instead of Pre‑made 9‑inch deep‑dish pie shells: Homemade pie crust

Equipment Needed

  • Oven
  • Baking sheet or roasting pan
  • Mixing bowl (large)
  • Hand whisk or electric mixer
  • Rubber spatula
  • Measuring cups and spoons
  • Peeler
  • Knife
  • Cooling rack (optional)

Critical Steps — Do Not Skip

  • Roast sweet potatoes instead of boiling to preserve color and sweetness.
  • Taste the filling before baking and adjust sugar as needed.
  • Start baking at 425°F for 15 minutes, then lower to 325°F for the remainder to achieve a golden top and a custard‑like interior.

Chef Tips from the Video

  • Use room‑temperature butter and eggs for a smoother batter.
  • Buttermilk adds a subtle tang that balances the sweet potatoes; if you dislike the tang, substitute with whole milk plus a splash of lemon juice.
  • For extra spice depth, add a pinch of ground ginger or use pumpkin pie spice in place of cinnamon and nutmeg.

Troubleshooting

Filling is too runny after baking.

Bake an additional 5‑10 minutes at 325°F, or add 1‑2 tbsp more flour or cornstarch to the batter before baking.

Top cracks or dries out.

Cover the pie loosely with foil halfway through the lower‑temperature bake.

Pie is not sweet enough.

Taste the batter before baking; add more granulated sugar a tablespoon at a time until desired sweetness.

Storage

Refrigerator: Cover tightly and store for up to 4 days.

Freezer: Wrap individual slices in plastic wrap and foil; freeze for up to 2 months.

Room temperature: Do not store at room temperature for more than 2 hours.

Make-Ahead Tips

  • The pies can be baked a day ahead and refrigerated; reheat gently at 300°F for 10‑15 minutes before serving.
  • Freeze baked, cooled pies wrapped tightly; thaw in the refrigerator overnight before reheating.

Last updated: August 9, 2026

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Buttermilk Sweet Potato Pie

Recipe by OLD SCHOOL SOUL FOOD

A creamy, tangy sweet potato pie made with roasted sweet potatoes and buttermilk. The pie is baked at a high temperature first for a golden crust, then finished at a lower temperature for a smooth, custard‑like filling. Perfect for fall holidays and Southern soul‑food gatherings.

MediumSouthern AmericanServes 8

Shop all ingredients on Amazon in one click • Printable PDF with shopping checklist

Source Video
5h 10m
Prep
1h
Cook
44m
Cleanup
6h 54m
Total

Cost Breakdown

$7.40
Total cost
$0.93
Per serving

Critical Success Points

  • Roast sweet potatoes instead of boiling to preserve color and sweetness.
  • Taste the filling before baking and adjust sugar as needed.
  • Start baking at 425°F for 15 minutes, then lower to 325°F for the remainder to achieve a golden top and a custard‑like interior.

Safety Warnings

  • Handle the hot oven and baking sheet with oven mitts.
  • Melted butter is hot; avoid splatter burns.
  • Use a sharp knife carefully when peeling roasted sweet potatoes.

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