Southern Sweet Potato Casserole: A Perfect Holiday Side Dish
Southern Sweet Potato Casserole is a classic and beloved side dish that brings a sweet and savory balance to any holiday table. This dish combines creamy mashed sweet potatoes with a rich brown sugar crumble and a topping of fluffy marshmallows, a traditional Southern favorite that’s sure to impress at Thanksgiving, Christmas, or any festive gathering.
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Why You’ll Love This Recipe
If you’re looking for a side dish that pairs perfectly with turkey, ham, or roast, Southern Sweet Potato Casserole offers the right combination of flavors and textures. The sweet potatoes provide a smooth and buttery base, while the crunchy oatmeal streusel topping adds a delightful contrast. The marshmallows add a touch of sweetness that completes this classic casserole, making it a staple in Southern cooking.

Southern Sweet Potato Casserole
Ingredients
Equipment
Method
- Preheat oven to 350°F (175°C). Bake sweet potatoes until soft, about 40–50 minutes. Let cool slightly, then peel.
- Mash the sweet potatoes in a large bowl with butter, eggs, heavy cream, brown sugar, cinnamon, nutmeg, and vanilla until smooth.
- In a separate bowl, combine oats, flour, brown sugar, cinnamon, and butter to form a crumbly mixture.
- Spread the mashed sweet potato mixture in a greased 9×13-inch baking dish. Layer with marshmallows, then sprinkle the crumble evenly over the top.
- Bake for 30–40 minutes, until the topping is golden and marshmallows are toasted. Let rest 10 minutes before serving.
Nutrition
Notes
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Let us know how it was!Essential Ingredients for Southern Sweet Potato Casserole
- Fresh sweet potatoes, the heart of this casserole
- Butter, for richness and a creamy texture
- Eggs, to bind the casserole ingredients together
- Heavy cream, enhancing the smoothness and decadence
- Warm spices such as cinnamon, nutmeg, and vanilla extract to elevate flavor
- Brown sugar, bringing the essential sweetness
- Quick-cooking oats mixed with flour and butter for a crispy crumble topping
- Miniature marshmallows to create the perfect finishing layer

How to Prepare Southern Sweet Potato Casserole
Begin by baking the sweet potatoes until they are soft and tender. Once cooled, peel off the skins and mash the potatoes thoroughly with butter, eggs, heavy cream, and the spice blend including cinnamon, nutmeg, and vanilla. Sweeten the mixture with brown sugar to achieve a rich, flavorful base.

Next, prepare the crumble topping by mixing oats, flour, brown sugar, cinnamon, and butter until crumbly. Spread the sweet potato mixture in a greased baking dish, top with a generous layer of marshmallows, then sprinkle the crumble topping evenly over everything.
Bake your Southern Sweet Potato Casserole at 350°F for 30 to 40 minutes or until the topping is golden and the marshmallows are lightly toasted. This casserole will fill your kitchen with inviting, warm aromas that signify comfort and celebration.
Make-Ahead Tips for Southern Sweet Potato Casserole
To save time during busy holiday meals, you can prepare the crumble topping and refrigerate it separately. You can also bake and peel the sweet potatoes in advance, storing them ready to mash. Assemble the casserole a few hours before baking and keep it chilled until ready to cook. Bring it to room temperature before baking for best results.

Pairing Southern Sweet Potato Casserole with Festive Dishes
Southern Sweet Potato Casserole complements many traditional Southern dishes such as baked mac and cheese, creamed corn, cornbread dressing, and cranberry sauce. Together, these plates create a holiday feast that tastes like home and celebration.
