Sweet Potato Casserole with Praline Marshmallow Topping is a quintessential Thanksgiving side dish, cherished for its irresistible blend of creamy sweetness and delightful textures. This ultimate recipe takes the classic to a new level by offering not one, but two incredible toppings: a crunchy, buttery praline and a gooey, perfectly toasted marshmallow layer. Prepare to elevate your holiday feast with this unforgettable dish!

Ah, sweet potato casserole! It’s one of those dishes that might not win any beauty contests, yet it undeniably holds a special place in our hearts and on our holiday tables. For years, I hesitated to share this beloved recipe on my blog, solely because capturing its rustic charm in a photograph felt like an impossible task. It’s certainly not the most photogenic star of the Thanksgiving spread, often overshadowed by the glistening turkey or beautifully arranged vegetable platters. Yet, its homely appearance belies a flavor profile so rich and comforting, it deserves every bit of praise and attention. This year, I decided it was time to put my camera qualms aside and finally share this treasured family recipe with you. Because some dishes are just too delicious not to share, no matter how “ugly” they might seem.
The moment the photos were finally done, my reward was immediate and glorious: a generous serving of this sweet potato marvel, laden with both its luscious toppings. That’s right—this casserole is a double threat! In our family, choosing between the sweet, toasted marshmallows and the nutty, crunchy praline topping is simply unthinkable. Why settle for one when you can have both? This harmonious blend of textures and flavors ensures every bite is an experience, from the creamy sweet potato base to the contrasting crispy and chewy toppings.

For us, this sweet potato casserole consistently outshines nearly every other Thanksgiving side dish – with the honorable exception of a hearty stuffing, which my husband and kids are equally passionate about. The anticipation builds each year for a big scoop of both on our plates, creating a perfect balance of savory and sweet that truly defines the holiday meal. It’s more than just a side; it’s a celebration of comfort food.
The secret to its widespread appeal in our home lies in its dual personality. The light, airy, and golden toasted marshmallow topping is an undeniable hit with the younger crowd, delivering that classic, sugary sweetness that delights children and adults alike. Meanwhile, the robust, nutty praline topping, with its rich brown sugar and butter crumble, is a firm favorite for my husband and me. By preparing a single casserole with both toppings, we ensure everyone at the table finds their personal slice of heaven. While each topping is fantastic on its own, I confess to a particular fondness for a scoop that includes a bit of both – the ultimate sweet potato experience!
One of the many beauties of this sweet potato casserole recipe is its flexibility, particularly for busy holiday preparations. You can easily make the entire casserole base and the praline topping a day in advance. Simply prepare the sweet potato mixture and spread it into your baking dish. For the praline topping, mix it up and store it separately in a sealed bag or container. When you’re ready to bake, sprinkle the praline topping over the sweet potatoes, and pop the dish into a preheated oven for about 25 minutes. Then, for the grand finale, add the mini marshmallows and bake for another 3 to 5 minutes, keeping a close eye on them until they’re perfectly golden and toasted. Be careful not to let them burn! For the praline, I typically use chopped walnuts, but pecans make an equally delicious and traditional alternative, adding their distinct nutty flavor and satisfying crunch.

Crafting the Perfect Sweet Potato Base
The foundation of any exceptional sweet potato casserole is, naturally, the sweet potatoes themselves. Choosing the right kind and preparing them properly is crucial. Look for firm, unblemished sweet potatoes, preferably Jewel or Garnet varieties, known for their moist texture and vibrant orange color. While boiling is the traditional method to soften them, roasting or baking sweet potatoes can intensify their natural sweetness and impart a richer, more caramelized flavor. If roasting, simply pierce the sweet potatoes a few times with a fork, place them on a baking sheet, and roast at 400°F (200°C) until fork-tender, usually 45-60 minutes. Once cooked, allow them to cool slightly before peeling. For the creamiest texture, pass the mashed sweet potatoes through a food mill or use an electric mixer. However, a little texture from hand-mashing can also be quite delightful.
Beyond the potatoes, the supporting cast of ingredients for the base is equally important. Eggs act as a binder, giving the casserole structure and a custardy consistency. Rich butter adds moisture and flavor, while brown sugar enhances the inherent sweetness of the potatoes, contributing a molasses-like depth. A touch of salt balances the sweetness, and pure vanilla extract provides an aromatic warmth that complements all the other flavors beautifully. Don’t be afraid to experiment with a pinch of cinnamon or nutmeg in the base for an extra layer of autumnal spice, though the focus here is on letting the sweet potatoes shine.
The Irresistible Praline Topping: A Symphony of Crunch and Sweetness
The praline topping is where this casserole truly distinguishes itself for many. It offers a contrasting texture and a sophisticated flavor profile that elevates the entire dish. This topping is essentially a buttery, sugary streusel mixed with nuts, which bakes into a delightfully crisp, caramelized layer. The combination of brown sugar and butter creates a rich, sweet base, while the addition of all-purpose flour ensures a perfect crumbly texture that holds together once baked. The star of this topping, of course, is the nuts. Chopped walnuts provide a lovely earthy bitterness that cuts through the sweetness, while pecans offer a slightly milder, buttery flavor. Whichever you choose, ensure they are roughly chopped to provide substantial pieces of crunch in every bite. To achieve that signature crumbly texture, gently mix the dry ingredients with the melted butter using a fork until coarse crumbs form. Avoid overmixing, as this can lead to a less crumbly, more dough-like texture.
This praline topping is not just about taste; it’s about the experience. The way it shatters slightly when you spoon into the casserole, revealing the creamy sweet potato beneath, is part of its charm. It adds a textural complexity that prevents the dish from being overly uniform, making each spoonful an adventure in itself. And for those who love a bit of savory contrast to their sweets, the nutty depth is absolutely essential.
The Classic Marshmallow Topping: Golden, Gooey Perfection
No sweet potato casserole is complete without the iconic marshmallow topping for many, and for good reason! It transforms from a simple white puff into a beautiful golden-brown, caramelized layer that melts into a gooey, sweet cloud. The mini marshmallows are preferred for their ability to spread evenly and toast quickly, creating a uniform blanket of sweetness. Timing is key when adding the marshmallows; they should be introduced towards the end of the baking process to prevent them from burning while ensuring they achieve that perfect toasted exterior. A few minutes under the broiler can also work wonders for an extra-crisp finish, but watch them diligently as they can go from perfectly golden to charred in seconds.
The marshmallow topping adds a playful element to the casserole, reminiscent of campfire s’mores but in a sophisticated holiday context. Its light, airy texture and intense sweetness perfectly complement the rich, dense sweet potato base. When combined with the praline, the contrast is spectacular – the yielding softness of the marshmallow against the firm crunch of the nuts creates a truly dynamic eating experience. This dual-topping approach is a testament to catering to diverse palates at the dinner table, guaranteeing that there’s a textural and flavor combination for everyone to adore.
Make-Ahead Magic and Storage Tips
The holidays are often synonymous with kitchen chaos, which is why a make-ahead friendly dish like this sweet potato casserole is a lifesaver. Preparing the casserole in stages can significantly reduce stress on the big day. As mentioned, the sweet potato base can be fully prepared and assembled in its dish a day or two in advance. Cover it tightly with plastic wrap and refrigerate. The praline topping can also be made ahead and stored in an airtight container at room temperature. On the day of serving, simply let the casserole dish come to room temperature for about 30 minutes before baking. Then, add the praline topping and bake as directed. The marshmallows should always be added fresh, just for the last few minutes of baking, to ensure they toast beautifully without losing their fluffy texture.
If you happen to have leftovers (a rare occurrence with this dish!), they can be stored in an airtight container in the refrigerator for up to 3-4 days. Reheat gently in the oven or microwave. While the toppings might lose some of their original crispness or fluffiness upon reheating, the core flavors remain wonderfully delicious. Freezing the unbaked casserole base (without toppings) is also an option for longer storage. Thaw overnight in the refrigerator before proceeding with baking and adding the toppings.
Serving Suggestions & Variations
While sweet potato casserole is a staple of Thanksgiving, its versatility allows it to grace other occasions as well. It pairs wonderfully with roasted chicken or ham for a festive Sunday dinner. For those looking to customize this recipe, there are several delicious variations to consider. A splash of orange juice or zest in the sweet potato base can add a bright, citrusy note that complements the sweetness. A touch of maple syrup instead of some brown sugar can deepen the autumnal flavors. For an adult-friendly version, a tablespoon or two of bourbon or rum can introduce a subtle, sophisticated warmth to the sweet potato mixture. Don’t shy away from additional spices like a pinch of ginger, allspice, or even a tiny dash of cayenne pepper for a surprising kick.
The beauty of this sweet potato casserole is its ability to adapt while retaining its comforting essence. Whether you stick to the classic dual-topping recipe or experiment with a few personal twists, it’s bound to be a showstopper. It’s more than just a dish; it’s a canvas for creating cherished holiday memories, year after year.
Sweet Potato Casserole with Praline Marshmallow Topping
Author: Anna
Sweet Potato Casserole with Praline Marshmallow Topping Recipe – a Thanksgiving dinner classic with two delicious toppings!
Prep Time: 25 mins
Cook Time: 30 mins
Total Time: 55 mins
Course: Side Dish
Cuisine: American
Servings: 5 servings
Calories: 517 kcal
Ingredients
- 2 lbs sweet potatoes
- 2 large eggs, well beaten
- 2 Tablespoons butter
- ½ cup packed brown sugar
- ½ teaspoon salt
- 1 teaspoon pure vanilla extract
For the Toppings:
- ½ cup packed brown sugar
- 3 Tablespoons all-purpose flour
- 2 Tablespoons butter, melted, cooled
- ¼ cup chopped walnuts or pecans
- 1 cup mini marshmallows
Instructions
- Lightly butter a 2-quart casserole dish. Set aside.
- Peel and dice the sweet potatoes. Place them in a pot with enough water to cover. Cook until they are very soft, easily pierced with a fork.
- While the potatoes are cooking, preheat your oven to 350 degrees F (175 degrees C).
- Once the sweet potatoes are cooked, drain them thoroughly and mash until smooth. Add the 2 Tablespoons of butter to the hot mashed potatoes and mix until completely melted and incorporated.
- In a separate small mixing bowl, whisk together the well-beaten eggs, ½ cup packed brown sugar, vanilla extract, and ½ teaspoon salt until well combined. Fold this mixture into the mashed sweet potatoes, mixing thoroughly. Spread the potato mixture evenly into the prepared casserole dish. Set aside.
- For the praline topping: In another mixing bowl, combine the remaining ½ cup packed brown sugar, all-purpose flour, and chopped walnuts or pecans. Add the 2 Tablespoons of cooled, melted butter and stir with a fork until the mixture forms a coarse, crumbly dough.
- Sprinkle the praline topping evenly over the mashed sweet potatoes in the casserole dish.
- Bake the casserole for 25 minutes. After 25 minutes, remove the dish from the oven, sprinkle the mini marshmallows over the praline topping.
- Return the dish to the oven and continue baking for another 3 to 5 minutes, or until the marshmallows are golden brown and toasted. Watch carefully to prevent burning.
- Allow the casserole to cool for a few minutes before serving. Enjoy!
Nutrition
Calories: 517 kcal | Carbohydrates: 92 g | Protein: 6 g | Fat: 14 g | Saturated Fat: 6 g | Cholesterol: 89 mg | Sodium: 457 mg | Potassium: 720 mg | Fiber: 5 g | Sugar: 56 g | Vitamin A: 26115 IU | Vitamin C: 4.4 mg | Calcium: 107 mg | Iron: 2.1 mg
