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Baked sweet potato casserole topped with golden marshmallows and pecan crumble in a white baking dish

Sweet Potato Casserole with Marshmallows (The 2025 Holiday Classic Reinvented)

Lina
This easy sweet potato casserole with marshmallows and pecan topping is a must-have Thanksgiving side. Halal-friendly, crowd-pleasing, and make-ahead ready.
Prep Time 35 minutes
Cook Time 38 minutes
Total Time 1 hour 8 minutes
Course Side Dish
Cuisine American
Servings 12
Calories 418 kcal

Ingredients
  

Sweet Potato Base:

  • 4 large sweet potatoes peeled and chopped (approx. 9 cups)
  • ½ cup unsalted butter or plant-based
  • 1 cup brown sugar
  • ½ tsp salt
  • ½ tsp cinnamon
  • ¼ tsp nutmeg
  • 1 tsp vanilla extract alcohol-free

Pecan Topping:

  • 4 tbsp melted butter
  • cup brown sugar
  • 2 tbsp all-purpose flour or gluten-free flour
  • ½ tsp salt
  • 1 ¼ cups chopped pecans

Marshmallow Layer:

  • 10 oz halal-certified mini marshmallows

Instructions
 

  • Boil peeled sweet potato chunks in water until fork-tender (about 20 minutes). Drain and mash.
  • Mix in butter, sugar, salt, cinnamon, nutmeg, and vanilla.
  • In a separate bowl, mix pecans, flour, sugar, salt, and butter.
  • Grease a 9x13” baking dish. Spread sweet potato mix evenly.
  • Top with pecan crumble, then cover with marshmallows.
  • Bake at 350°F for 25–35 minutes until bubbly and golden on top.

Serve warm and enjoy!

    Notes

    Storage: Store in the fridge for up to 5 days. Reheat in oven or microwave.
    Make-Ahead Tip: Assemble without marshmallows, refrigerate, and add topping before baking.
    Keyword Kid-Friendly, SweetPotato, Thanksgiving