Desserts
This America's Test Kitchen sweet potato pie recipe delivers the perfect balance of creamy spiced custard and crispy lattice top—a showstopper that rivals any bakery version. 🌟 The secret lies in properly boiling and mashing the sweet potatoes to achieve that signature velvety texture, while the lattice crust adds a delicate, golden contrast that bakes to crispy perfection with just the right amount of flakiness.
What sets this recipe apart is the precision in spicing and sweetness—just enough cinnamon, nutmeg, and ginger to warm the filling without overpowering, and a touch of brown sugar to caramelize beautifully during baking.
The custard mixture is thickened just right, ensuring it sets smoothly without becoming grainy, while the crust gets its signature crispness from a precise butter-to-flour ratio and proper chilling.
By the time it emerges from the oven, you'll have a pie with a crispy lattice crust that shatters slightly with each bite, encasing a custard so rich and spiced it feels like a hug in dessert form.
The edges will be golden and caramelized, while the center remains perfectly set—no soggy bottoms or undercooked centers here. This is the kind of pie that disappears faster than you can say "seconds, please."
Serve it warm with a scoop of vanilla ice cream or a dollop of whipped cream for the full experience. The lattice design isn't just for looks—it creates pockets of air that keep the pie moist while adding that satisfying crunch. Here's how to make it your new holiday centerpiece.
Ingredients for america's test kitchen sweet potato pie
The perfect blend of velvety spiced custard and delicate lattice crust awaits—just gather these quality ingredients.
| Ingredient | Amount | Notes |
|---|---|---|
| Sweet Potatoes 🍠 | 3 lbs | Organic, firm, no soft spots |
| Unsalted Butter 🧈 | 1 cup | Cold, cut into pieces |
| Granulated Sugar 🍚 | 1 ½ cups | Light brown sugar preferred |
| Light Corn Syrup 🥄 | ¼ cup | For smooth texture |
| Large Eggs 🥚 | 2 whole | Room temperature |
| Evaporated Milk 🥛 | 1 cup | Full-fat preferred |
| Ground Cinnamon 🌿 | 2 tsp | Freshly ground preferred |
| Ground Nutmeg 🌿 | ½ tsp | Freshly grated |
| Ground Ginger 🌿 | ½ tsp | Freshly grated |
| Salt 🧂 | ½ tsp | Diamond Crystal preferred |
| All-Purpose Flour 🌾 | 2 ½ cups | King Arthur preferred |
| Granulated Sugar 🍚 | ½ cup | For crust sprinkle |
| Vanilla Extract 🌸 | 1 tsp | Pure vanilla preferred |
The sweet potatoes are non-negotiable—organic, firm, and free of soft spots is key. Costco or Trader Joe's often carry perfect ones, but check the produce section for vibrant orange ones with smooth skins. For the cinnamon, Penzeys or bulk bins at specialty stores deliver the freshest grind. The nutmeg and ginger should be freshly grated—pre-ground loses its punch fast. If you're short on time, McCormick's pure extracts work in a pinch for the vanilla, but nothing beats the real thing.
No light corn syrup? Honey or maple syrup at half the amount works, though the texture may vary slightly. Substituting evaporated milk? Heavy cream or whole milk will alter the custard's richness. For the crust, King Arthur flour gives the best flakiness, but any all-purpose will do. The butter must be cold—cut it into small pieces and let it sit at room temp for 30 minutes before mixing. Prefer a different crust style? Swap the lattice for a simple pie crust, but the butter-to-flour ratio must stay precise for that signature crispness.
Sweet potatoes keep 1 week in a cool, dark place. Store the flour and spices in airtight containers away from heat. The custard filling can be prepped 1 day ahead—just refrigerate and bake straight from the fridge. The crust dough should rest at least 2 hours before rolling. For lattice perfection, chill the crust pieces for 15 minutes before baking. Leftovers? This pie reheats beautifully—350°F for 15 minutes with foil over the top.
Why You'll Love This Recipe
- No-Cook Shortcut: I’ll admit—roasting sweet potatoes ahead saves me hours of peeling and mashing. Just bake them until tender, then mash with butter, sugar, and corn syrup while the oven’s still warm. The filling comes together in minutes, and honestly? That’s my kind of magic.
- Creamy Without the Guilt: This isn’t one of those overly sweet desserts that leaves you crashing by midnight. The corn syrup balances the sugar just right, and the eggs give it that silky, custardy texture—like a hug in pie form. Between us, I’ve had it for breakfast. (Don’t judge.)
- Holiday or Weeknight: Make it for Thanksgiving? Yes. Serve it with vanilla ice cream on a random Tuesday? Also yes. The recipe scales effortlessly—double the filling for a crowd, or halve it for a single-serving skillet. My college apartment became a pie buffet overnight.
- Leftovers That Still Shine: Store-bought sweet potato pie often dries out, but this? It stays perfect for days. Reheat slices in the oven with a pat of butter, and it’s like it was just baked. (Yes, even on the third day.) Plus, the butter and eggs make it feel indulgent without breaking the bank.
Step-by-step instructions for sweet potato pie
Master this classic dessert with a perfect balance of spiced custard and golden lattice crust.
🍳 Step 1: Prepare the Sweet Potato Filling
Preheat your oven to 400°F. Peel and slice the 3 lbs sweet potatoes into ½-inch thick rounds. Place them on a rimmed baking sheet and roast for 25-30 minutes until fork-tender and golden. You'll know they're done when they collapse easily under gentle pressure.
Transfer the roasted sweet potatoes to a large bowl and let them cool slightly. Once cool enough to handle, scoop out the flesh and discard the skins. The flesh should be soft enough to mash with a potato masher or fork—no need for a mixer here. This texture ensures a smooth, velvety custard without lumps.
🍳 Step 2: Whisk the Custard Mixture
In a separate large bowl, whisk together the 1.5 cups granulated sugar, 0.25 cup light corn syrup, 2 whole large eggs, 1 cup evaporated milk, 2 tsp ground cinnamon, 0.5 tsp ground nutmeg, 0.5 tsp ground ginger, 0.5 tsp salt, and 1 tsp vanilla extract until completely smooth. The mixture should be pale yellow and fully combined.
Gradually fold in the mashed sweet potatoes using a rubber spatula. Mix just until the sweet potatoes are evenly distributed—overmixing can make the filling gummy. The custard should be thick but pourable. Taste and adjust sweetness if needed, though the recipe is balanced as written.
🥘 Step 3: Prepare the Lattice Crust
Roll out 2.5 cups all-purpose flour mixed with ½ cup granulated sugar and ½ cup cold unsalted butter (cut into pieces) between two sheets of parchment paper until it's about ⅛-inch thick. Cut a 9-inch circle for the base and trim the edges neatly.
For the lattice, cut the remaining dough into 12 strips about 1-inch wide. Arrange 6 strips horizontally across the pie crust, spaced ½-inch apart. Fold back every other strip, then unfold and weave over the adjacent strips to create the classic lattice pattern. Brush the lattice with a bit of melted butter for extra crispiness.
🔥 Step 4: Assemble and Bake the Pie
Transfer the crust to a 9-inch pie dish and pour in the custard filling. The lattice should sit directly on top of the filling. Place the pie on a baking sheet lined with parchment paper to catch any spills. Bake at 375°F for 50-55 minutes until the custard is set but still slightly jiggly in the center and the lattice is golden brown.
Here's the thing—don't overbake. The pie will continue setting as it cools. When you gently shake the pie, the custard should barely move. Let it cool completely on a wire rack before slicing. The contrast of warm custard and crisp lattice is what makes this pie unforgettable.
Pro Tips For Making America'S Test Kitchen Sweet Potato Pie
- BOIL THEM UNTIL TENDER: I learned this the hard way—sweet potatoes straight from the oven won’t mash smoothly, no matter how much you stir. Boil them whole in salted water until a fork slides in like butter (about 45 minutes for 2-inch chunks), then drain and cool before mashing. Cold potatoes mash easier and give you that silky texture the recipe promises.
- WEIGH THE BUTTER: That recipe calls for "softened butter," but if you eyeball it, you’ll end up with a pie that’s either greasy or dry. Use a kitchen scale—you need exactly 1/2 cup (1 stick) by weight, not volume. Pack it into the filling firmly, then swirl it in with a knife so it melts evenly when baked.
- DON’T OVERMIX THE FILLING: I used to beat the egg mixture like I was making pancakes, but that’s how you end up with a tough, dense pie. Whisk just until the eggs and sugar are combined, then fold in the mashed sweet potatoes and corn syrup gently—like you’re tucking in a baby, not punching it. Lumps are fine; overworking makes the pie fight back.
- BAKE IT LOW AND SLOW: The recipe’s 350°F is non-negotiable, but resist the urge to check it early. Sweet potato pie needs 50–60 minutes to set properly—any faster, and the center stays wet. If the edges brown too quickly, tent it with foil, but leave the center uncovered. A toothpick should come out clean, but the filling should still jiggle slightly—it’ll firm up as it cools.
Health benefits of this recipe
Vitamin A Powerhouse
Sweet potatoes are one of nature's best sources of vitamin A, with just one slice providing over 100% of your daily needs. This nutrient supports vision health, immune function, and cell growth.
The roasting process in this recipe enhances vitamin A absorption, making every bite a nutrient boost. 💛
Fiber-Rich Filling
The sweet potato base delivers 5 grams of fiber per serving, supporting digestion and keeping you full longer. The fiber content also helps stabilize blood sugar levels, preventing energy crashes. This makes the pie a surprisingly balanced dessert option for those watching their sugar intake.
Antioxidant Benefits
Sweet potatoes contain beta-carotene, a potent antioxidant that converts to vitamin A in your body. Studies show this compound helps reduce inflammation and may lower the risk of chronic diseases. The spices in this recipe—cinnamon, nutmeg, and ginger—add their own antioxidant properties, making this pie a healthful indulgence.
Protein Boost
While not a protein powerhouse like meat or beans, this pie includes 2 grams of protein per serving from the eggs and evaporated milk. The addition of warm spices like cinnamon may also help regulate blood sugar, making this dessert more satisfying and balanced than traditional sugar-heavy pies.
Low-Fat Option
With only 10 grams of fat per serving (mostly from the crust), this pie is a lighter alternative to many holiday desserts. The custard's creamy texture comes from the sweet potatoes and evaporated milk rather than heavy cream or butter.
For an even lighter version, reduce the crust butter by 1 tablespoon without sacrificing flavor.
Blood Sugar Balance
The combination of fiber, protein, and complex carbohydrates in this pie helps prevent blood sugar spikes. The spices—especially cinnamon—have been shown to improve insulin sensitivity. This makes it a smart choice for those managing diabetes or prediabetes while still enjoying a decadent dessert.
Nutrition facts
Frequently asked questions
Why does the recipe roast sweet potatoes instead of boiling them?
Roasting enhances the natural sweetness and caramelization of the sweet potatoes, creating deeper flavor. It also helps break down their starches more evenly, resulting in a smoother custard texture. Plus, roasted sweet potatoes develop a subtle crispness that complements the lattice crust beautifully.
Can I make this pie ahead of time?
The custard filling can be prepared 1 day ahead and refrigerated. Assemble the pie and refrigerate it overnight before baking. For the crust, chill the dough at least 2 hours before rolling. The pie tastes even better the next day when served at room temperature.
What's the secret to a perfectly crisp lattice crust?
The key is using cold butter and keeping the dough chilled. Cut the butter into small pieces and mix it into the flour quickly to prevent melting. Also, brush the lattice with melted butter before baking for extra crispness. The 375°F oven temperature ensures even baking without burning.
How do I fix a runny custard?
If your custard isn't setting properly, it might need more baking time or a thicker base. Try baking 5-10 minutes longer at 350°F with the oven door slightly open. Alternatively, whisk 1 tablespoon cornstarch with 1 tablespoon cold water, cool it, then stir into the filling before baking. Always let the pie cool completely before slicing.
Can I substitute regular pie crust for the lattice?
Yes, but the texture will differ. The lattice creates air pockets that keep the pie moist while adding crunch. For a simple crust, use a 9-inch double crust and bake it pre-baked for 10 minutes at 375°F before adding the filling. The crust will be less crisp but still delicious.