How to make my Grandmama’s Sweet Potato Pie

Some desserts feel like home the moment they hit the table. This sweet potato pie was one of them. My grandmother made it every holiday; silky smooth, rich with flavor, and just the right amount of spice. After years of testing and measuring to recreate her “three shakes of nutmeg,” this is the version that tastes exactly like the one I grew up with.

If you’re ready to bake a pie that delivers comfort in every slice, you’re in the right place.

What You’ll Need

Equipment

• Food processor or blender
• Spatula
• Measuring cups
• Measuring spoons

Ingredients

• 4 large sweet potatoes
• 1 cup unsalted butter
• 2 large eggs, room temperature
• ½ tsp nutmeg
• ½ tsp cinnamon (optional)
• ¾ cup evaporated milk
• 1 ½ cups granulated sugar
• 1 tablespoon vanilla extract
• 2 frozen pie shells

Instructions

Step 1: Bake the Sweet Potatoes

Preheat the oven to 425°F. Bake the sweet potatoes for 40–55 minutes, or until soft. Baking instead of boiling keeps the potatoes flavorful and prevents watered-down filling.

Step 2: Prep for Mixing

Reduce the oven temperature to 400°F.
Set the frozen pie shells on the counter to lightly thaw while the potatoes cool.

Let the potatoes rest for about 20 minutes. The skins will begin to shrivel and pull away, making them easy to peel. Remove skins and discard any very dark spots.

Step 3: Blend the Filling

Place the peeled sweet potatoes into a food processor or blender and blend until completely smooth.
Add butter, evaporated milk, sugar, nutmeg, cinnamon (if using), and vanilla. Blend again until silky.

Scrape down the sides to check for any lumps or stringy pieces. Taste the filling before adding the eggs to ensure the flavor is balanced.
Add eggs and blend again until the mixture is smooth and unified.

Step 4: Fill and Bake

Divide the filling evenly between the two pie shells.
Cover the crust edges with foil for the first 40 minutes of baking.

Bake for 20 minutes, then rotate the pans (a cookie sheet makes this easier).
Remove foil and continue baking for 10–13 more minutes, or until the top is set with a slight jiggle.

Let the pies cool and fully set before slicing.

Chef Tips (Baking Science)

• Baking vs. boiling: Baking sweet potatoes evaporates excess moisture and caramelizes natural sugars, giving your sweet potato pie a deeper flavor and silkier texture.
• Why a food processor works best: Sweet potatoes contain long fibers. A processor breaks them down completely, giving you a smooth, custard-like filling with no strings.
• Evaporated milk matters: Evaporated milk has less water and more concentrated dairy solids, which helps the custard set. Regular milk won’t give the same structure or richness.
• Spice balance: Nutmeg is the traditional flavor. Cinnamon adds extra warmth but isn’t part of the original recipe—use it only if you enjoy that added layer.

Pro Tips for Success

• Check the potatoes for softness starting at 30 minutes—they vary in size and shape.
• Always taste the filling before adding eggs; once the eggs go in, you can’t adjust sweetness or spice.
• If your filling seems too thick, blend a few extra tablespoons of evaporated milk until it loosens slightly.
• Bake the pies on a cookie sheet for easy rotation and to prevent any spills in the oven.
• Let the pies cool completely before slicing so the custard sets properly.

FAQs

Can I use canned sweet potatoes?

For the best texture and flavor, fresh potatoes are strongly recommended. Canned versions can be watery and overly sweet.

Do I have to use evaporated milk?

Yes. Sweet potato pie relies on the concentrated dairy solids in evaporated milk—Carnation is my preferred brand. Substitutions will change the texture.

Why is my filling stringy?

This happens when the sweet potatoes aren’t blended fully. Use a food processor for the smoothest texture.

Can I make the pies ahead?

Yes. Sweet potato pie keeps beautifully. Store covered in the refrigerator for 3–4 days.

Why This Recipe Works

This sweet potato pie delivers the smooth, nostalgic flavor families pass down through generations. Baking the potatoes intensifies flavor, the food processor ensures a silky finish, and evaporated milk gives the filling the structure it needs. It’s reliable, rich, and rooted in tradition—exactly the kind of recipe worth sharing.

Discover our favorite pies

My Grandma’s Sweet Potato Pie

This sweet potato pie delivers the smooth, nostalgic flavor families pass down through generations. Baking the potatoes intensifies flavor, the food processor ensures a silky finish, and evaporated milk gives the filling the structure it needs.
Prep Time 1 hour
Cook Time 50 minutes
Resting Time 20 minutes
Total Time 2 hours 10 minutes
Servings: 8
Course: Dessert
Cuisine: American

Ingredients
  

  • 4 large sweet potatoes
  • 1 cup unsalted butter
  • 2 large eggs brought to room temperature
  • ½ tsp nutmeg
  • ½ tsp cinnamon
  • ¾ cup evaporated milk
  • 1 ½ cup granulated sugar
  • 1 tablespoon vanilla extract
  • 2 frozen pie shells

Equipment

Method
 

  1. Bake the sweet potatoes in a 425-degree oven for 40-55 min
  2. Reduce the oven temperature to 400 degrees
  3. Remove frozen pie shells from the oven and set them out on the counter to lightly thaw.
  4. Allow potatoes to cool for 20 mins – the skin will pull away from the potato and begin to shrivel
  5. Once you can handle peeling the skin off and removing any super dark spots, place into a food processor or blender and mix until smooth.
  6. Next, add room temperature butter, evaporated milk, sugar, nutmeg, cinnamon and vanilla.
  7. Blend until smooth.
  8. Scrape down the sides and make sure no lumps are present, then taste it before adding the eggs (Just making sure everything is balanced).
  9. Add eggs blend until smooth
  10. Evenly distribute between the two pie pans
  11. Cover the edges of the pie crust with foil for the first 40 mins of baking
  12. After 20 mins of baking, rotate the pans in the oven (I place my pan on a cookie sheet to make this easy)
  13. Remove the foil and allow to continue baking until golden brown 10-13 min
  14. Remove and let set – it will still be a little jiggle to the top

Notes

Disclaimer: My grandmothers original recipe did not include cinnamon and called for 3 shakes of nutmeg. After several years of testing out measurements to replicate the pie from my childhood, I landed on these measurements. Cinnamon is completely optional.
Baking time is dependent upon on your oven and the size of the potatoes so check them for softness starting at 30 mins in.
For other cooking options, check out our sweet potato puree post for stove top instructions
For many years, I made my pie filling in a mixer until I did it in a food processor and it completely changed my method. It’s creamy, silky and smooth, no lumps, no strings.
Please don’t try this using anything other than canned evaporated milk-specifically Carnation

Tried this recipe?

Let us know how it was!

Leave a Reply

Your email address will not be published. Required fields are marked *

Recipe Rating