Pecan Southern Sweet Potato Casserole
A classic Southern-style sweet potato casserole featuring a smooth, buttery sweet potato filling enriched with brown sugar, vanilla, and pecans. The casserole is finished with miniature marshmallows and additional pecans, which become golden, toasted, and lightly crisp in the oven.
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Ingredients
Sweet Potato Filling
- 4 pounds sweet potatoes peeled and cut into roughly 1-inch cubes
- 1 teaspoon salt
- 2 large eggs
- 1/4 cup pecans very finely chopped for even dispersal
- 1 teaspoon pure vanilla extract
- 1/2 cup unsalted butter softened at room temperature
- 1/2 cup whole milk brought to room temperature
- 3/4 cup light brown sugar firmly packed
Marshmallow-Pecan Topping
- 1/4 cup pecans chopped, optional but recommended
- 2 cups miniature marshmallows
Instructions
- Cook the sweet potatoes. Peel the sweet potatoes and cut them into approximately 1-inch cubes so that they cook at a consistent rate. Transfer them to a large pot and add enough cold water to cover them completely.
- Bring the water to a boil over high heat. Reduce the heat to maintain a simmer and cook the sweet potatoes for 10–15 minutes, or until they are completely tender when pierced with a fork.
- Drain the potatoes thoroughly in a colander. Press them gently to help release excess moisture, as retaining too much water can result in a loose or soggy casserole.
- Prepare the oven and baking dish. While the potatoes are cooking, preheat the oven to 375°F with the rack positioned in the center. Lightly coat a 9 × 13-inch casserole dish, or a similarly sized baking dish, with cooking spray.
- Make the sweet potato filling. Transfer the drained sweet potatoes to a large mixing bowl while they are still warm. Add the softened unsalted butter, packed light brown sugar, room-temperature whole milk, eggs, vanilla extract, and salt.
- Beat the mixture with an electric mixer at medium speed for approximately 2–3 minutes, continuing until the sweet potatoes are smooth, creamy, and evenly blended.
- Using a spoon or spatula, carefully fold in the finely chopped 1/4 cup pecans until they are evenly distributed throughout the sweet potato mixture.
- Assemble the casserole. Spoon the prepared sweet potato filling into the greased casserole dish. Spread it evenly with a spatula, smoothing the surface into a level layer.
- Distribute the miniature marshmallows evenly over the sweet potato mixture, leaving small spaces between some of them so they can expand and melt as the casserole bakes.
- Sprinkle the remaining 1/4 cup chopped pecans over the marshmallows, if using. The nuts will toast during baking and add a crisp, nutty finish.
- Bake the casserole. Place the assembled dish in the preheated 375°F oven and bake for 25–30 minutes.
- Begin checking the casserole at approximately 25 minutes. It is ready when the marshmallows have puffed and developed a light golden-brown color, the edges are gently bubbling, and the sweet potato filling is thoroughly heated.
- Rest and serve. Remove the casserole from the oven and allow it to stand for 5 minutes. This brief resting period helps the filling settle slightly while keeping the marshmallow topping soft and gooey.
- Serve the casserole warm directly from the baking dish.
Notes
Using room-temperature milk helps it blend more smoothly into the warm sweet potatoes and contributes to a velvety consistency.
Drain the cooked sweet potatoes thoroughly before mixing the filling, since excess water can negatively affect the casserole's texture.
The additional 1/4 cup of pecans in the topping is optional, although it provides extra crunch and a richer toasted-nut flavor.