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Creamy Southern Sweet Potato Casserole Recipe – Best Streusel & Marshmallow Topping

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This classic Southern sweet potato casserole features a creamy, buttery sweet potato filling topped with a crunchy pecan streusel and gooey marshmallows. It’s a nostalgic comfort food perfect for holidays and family gatherings.

Ingredients

Scale
  • 4 large sweet potatoes (about 2 lbs), peeled and cubed
  • 1/3 cup unsalted butter, softened
  • 1/2 cup heavy cream or whole milk
  • 2 large eggs, room temperature
  • 2/3 cup granulated sugar
  • 1/2 tsp ground cinnamon
  • 1/4 tsp ground nutmeg (optional)
  • 1 tsp pure vanilla extract
  • 1/2 tsp salt
  • 3/4 cup all-purpose flour
  • 1/2 cup brown sugar, packed
  • 1/2 cup unsalted butter, melted
  • 1 cup chopped pecans
  • Pinch of salt
  • 2 to 3 cups mini marshmallows

Instructions

  1. Peel and cube sweet potatoes. Place in a large pot, cover with cold water, and add a generous pinch of salt. Bring to a boil, then simmer for 15-20 minutes until tender. Drain and let cool for 5 minutes.
  2. Transfer sweet potatoes to a large mixing bowl. Add softened butter and mash until mostly smooth. Add cream or milk, eggs, sugar, cinnamon, nutmeg, vanilla, and salt. Beat until creamy and lump-free.
  3. Preheat oven to 350°F (175°C). Grease a 9×13-inch baking dish. Spread sweet potato mixture evenly in the dish.
  4. In a medium bowl, combine flour, brown sugar, and a pinch of salt. Stir in melted butter until crumbly. Fold in chopped pecans. Scatter streusel evenly over sweet potato layer.
  5. Sprinkle mini marshmallows evenly over the streusel.
  6. Bake for 25-30 minutes, until marshmallows are golden and puffed and streusel is crisp. If marshmallows brown too quickly, cover loosely with foil for the last 10 minutes.
  7. Remove from oven and let cool for at least 10 minutes before serving.

Notes

For extra flavor, roast sweet potatoes instead of boiling. Use almond or oat flour for gluten-free, coconut milk and plant-based butter for dairy-free, and pumpkin seeds or pretzels for nut-free. Let casserole rest after baking for best texture. Watch marshmallows closely to prevent burning.

Nutrition

Keywords: sweet potato casserole, southern casserole, Thanksgiving side, marshmallow topping, pecan streusel, holiday recipe, comfort food

Find it online: https://norasfoods.com/creamy-southern-sweet-potato-casserole-recipe-best-streusel-and-marshmallow-topping/