This bourbon sweet potato pie features a silky, spiced custard topped with toasted marshmallow meringue for the ultimate cozy holiday Desserts.
- Starch Gelatinization: Boiling the sweet potatoes whole locks in moisture and activates natural amylase enzymes, converting starches into sweet maltose before they are pureed.
- Yolk-to-White Ratio: Utilizing extra egg yolks instead of whole eggs creates a tight, velvety protein matrix that sets beautifully without becoming rubbery or watery.
- Acid Stabilization: Adding cream of tartar lowers the pH of the egg whites, strengthening the protein bonds to yield a glossy, weep-free marshmallow meringue.
I still remember the cold November afternoon my grandmother handed me a warm, damp kitchen towel to rub the skins off boiling-hot sweet potatoes, my fingertips tingling as the sweet, earthy steam filled the cramped kitchen. It was a messy, sticky ritual that always culminated in a classic Southern pie, though back then, we never splashed a generous pour of bourbon into the custard. If you love the caramelized depth of candied sweet potatoes, this pie takes those same warm notes and spins them into something truly elegant.
This version changes everything.
By boiling the sweet potatoes whole in their skins, we prevent waterlogging and allow the natural sugars to concentrate. When pureed with softened butter and dark brown sugar, the mixture undergoes a beautiful transformation where the starch gelatinization creates a luxurious, velvety texture. Adding a splash of bourbon—nothing fancy, just standard Jim Beam—adds a woody complexity that cuts right through the heavy cream and warm spices. While an apple cheddar pie offers a savory-sweet contrast, this sweet potato version leans entirely into deep, caramelized comfort.
When it comes to salt, I always reach for Diamond Crystal kosher salt; if you are using Morton's, scale it back by half to avoid an accidental salt bomb.
The real showstopper is the marshmallow meringue, which we cook gently over a water bath to 160°F (71°C) before whipping. This pasteurizes the egg whites and dissolves the sugar crystals completely, ensuring your topping stays glossy and never weeps onto the spiced custard below. It is quite similar to a batch of homemade marshmallow creme but with a lighter, sliceable structure that holds its shape beautifully under a kitchen torch.
Bourbon Sweet Potato Pie with Marshmallow Topping
Ingredients
- 1 unbaked Flaky Pie Crust or All Butter Pie Crust
- 1 large egg (for egg wash)
- 1 Tablespoon (15ml) milk or heavy cream (for egg wash)
- 1.5 lbs sweet potatoes (about 2 medium/large potatoes)
- 6 Tablespoons (85g) unsalted butter, super soft
- 2/3 cup (135g) packed dark brown sugar
- 1/2 cup (120ml) heavy cream
- 1/4 cup (60ml) bourbon
- 1 large egg
- 2 large egg yolks
- 1 Tablespoon (8g) all-purpose flour
- 1 teaspoon pure vanilla extract
- 1 teaspoon ground cinnamon
- 1/2 teaspoon ground nutmeg
- 1/2 teaspoon ground ginger
- 1/4 teaspoon ground cloves
- 1/8 teaspoon salt
- 2 large egg whites (for meringue)
- 1/2 cup (100g) granulated sugar (for meringue)
- 1/4 teaspoon cream of tartar (for meringue)
- 1/2 teaspoon pure vanilla extract (for meringue)
Directions
- Prepare your pie dough ahead of time, wrapping it tightly and letting it chill in the refrigerator for at least 2 hours to relax the gluten network before rolling.
- Place the whole, unpeeled sweet potatoes into a large saucepan, submerge them completely in water, and bring to a rolling boil over high heat. Cook for 45 to 50 minutes until a paring knife easily slides into the thickest part of the potato.
- While the potatoes boil, roll out your chilled pie dough on a lightly floured surface into a 12-inch circle, rotating it slightly after each roll to prevent sticking. Transfer the round to a 9-inch pie dish, fold the overhang underneath itself to create a thick border, and crimp the edges. Brush the rim with an egg wash made by beating 1 large egg with 1 tablespoon of milk or heavy cream, then chill the crust in the freezer for 15 minutes to prevent shrinkage.
- Preheat your oven to 350°F (177°C).
- Drain the boiled sweet potatoes and run them under cold tap water until they are cool enough to handle. Slip the skins off with your fingers, cut the flesh into large chunks, and place them into a large mixing bowl.
- Beat the warm sweet potatoes on medium-high speed with an electric mixer until completely smooth. Add the softened butter, dark brown sugar, heavy cream, bourbon, whole egg, egg yolks, flour, vanilla, cinnamon, nutmeg, ginger, cloves, and salt, then whip on high speed until the batter is uniform and light. Pour this filling into your chilled pie shell.
- Bake for 55 to 60 minutes, checking halfway through to see if the crust edges need to be shielded with foil to prevent over-browning. The pie is done when the edges are set and the center has a slight, uniform jiggle.
- Transfer the pie to a wire cooling rack and let it sit undisturbed for at least 2 hours. The filling will deflate slightly and firm up as it cools to room temperature.
- To make the marshmallow meringue, combine the 2 egg whites, granulated sugar, and cream of tartar in a heatproof bowl set over a pot of gently simmering water, ensuring the bottom of the bowl does not touch the water. Whisk constantly for about 4 minutes until the sugar dissolves and the mixture reaches 160°F (71°C) on an instant-read thermometer. Remove from the heat, add the vanilla extract, and beat on high speed with a whisk attachment for 5 minutes until stiff, glossy peaks form.
- Spoon the billowy meringue over the cooled pie, spreading it to the edges. Use a kitchen torch to lightly toast the swirls until golden brown, or serve as is.
- Keep the pie covered and store leftovers at room temperature for 1 day, or transfer to the refrigerator for up to 5 days.
Notes
Keep these essential tips in mind to ensure your pie turns out perfectly every single time:
- Salt and Butter: Always use unsalted butter to control the sodium levels. For the salt, this recipe specifies Diamond Crystal kosher salt. If using fine table salt or Morton's, use just a tiny pinch (about 1/16 teaspoon) to avoid over-seasoning.
- Egg Chemistry: The addition of two extra egg yolks provides lecithin, a natural emulsifier that binds the bourbon and heavy cream into a cohesive, sliceable custard rather than a separated, watery mess.
- Crust Protection: Keep a close eye on the crust during the final 20 minutes of baking. If the fluted edges begin to darken past a golden brown, immediately slip a pie shield or a ring of aluminum foil over the top to prevent burning.
- Make-Ahead Strategy: You can bake the pie custard a day in advance and store it covered in the fridge. Whip and spread the fresh marshmallow meringue on top within a few hours of serving to maintain its airy, billowy volume.
- Oven Browning: If you do not own a kitchen torch, slide the meringue-topped pie into an oven preheated to 450°F (232°C) for 2 to 3 minutes. Watch it like a hawk, as the sugar in the meringue can go from beautifully bronzed to charred in seconds.
Serving Suggestions
This rich, spiced pie pairs beautifully with accompaniments that balance its sweet, custardy profile:
- Serve alongside a cup of dark, chicory-brewed black coffee to cut through the rich, sugary sweetness of the marshmallow topping.
- Pair with a glass of neat, high-rye bourbon to echo the oaky, vanilla undertones baked into the sweet potato custard.
- Add a scattering of toasted, salted pecans on the side for a crunchy, savory contrast to the silky smooth filling.
- Offer a spoonful of tart cranberry compote to provide a bright, acidic counterpoint to the deep, caramelized brown sugar notes.
Storage and Reheating
Once the pie is sliced, the marshmallow meringue will slowly begin to lose its structure. After 24 hours in the fridge, you might notice a tiny bit of separation or weeping where the meringue meets the custard, though it remains entirely delicious to eat.
Store any leftover pie loosely covered with plastic wrap in the refrigerator for up to 5 days. Avoid pressing the wrap directly onto the meringue, or you will peel off that gorgeous toasted layer when you uncover it.
If you plan to freeze the pie, do so before adding the meringue. The baked sweet potato custard freezes beautifully for up to 3 months when wrapped tightly in double layers of plastic wrap and aluminum foil.
Thaw the frozen pie overnight in the refrigerator, let it sit on the counter to lose its chill, and then whip up a fresh batch of meringue to torch right before your guests arrive.
Ingredient Substitutes
If you need to adapt this recipe for dietary needs or pantry limitations, use these tested swaps:
- Bourbon → Apple Cider: Swap the 1/4 cup of bourbon for an equal amount of apple cider for an alcohol-free version, reducing the brown sugar by 1 tablespoon to balance the extra sweetness.
- Dark Brown Sugar → Coconut Sugar: Replace the 2/3 cup of dark brown sugar with coconut sugar at a 1:1 ratio, whisking the sweet potato mixture for an extra minute to ensure the coarser granules fully dissolve.
- Heavy Cream → Full-Fat Coconut Milk: Substitute the 1/2 cup of heavy cream with well-shaken, full-fat canned coconut milk at a 1:1 ratio, ensuring the sweet potato puree is completely warm when mixing to prevent the coconut fat from seizing.
- All-Purpose Flour → Cornstarch: Swap the 1 tablespoon of all-purpose flour for 1.5 teaspoons of cornstarch, whisking it thoroughly into the cold cream before adding to the sweet potatoes to prevent clumping.
There is something incredibly grounding about watching a billowy cloud of meringue take on a deep, golden-brown toast under the flame of a torch. It turns a humble Southern staple into a dramatic centerpiece that lingers in your memory long after the last crumbs are swept away.
