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Sweet Potato Marshmallow Dish Recipe (The Ultimate Festive Casserole)

A timeless holiday classic combining creamy, spiced roasted sweet potatoes with a gooey, caramelized marshmallow topping. Perfectly balanced with warm spices, this human-approved recipe brings nostalgic comfort and professional-grade texture to your Thanksgiving or family dinner table.
Print Recipe
Prep Time 20 minutes
Cook Time 1 hour
Servings: 8
Course: Side Dish
Cuisine: American
Calories: 310
Ingredients Method

Ingredients
  

  • 4 large Sweet potatoes washed and cleaned
  • ½ cup Unsalted butter melted
  • ⅓ cup Light brown sugar packed
  • ⅓ cup Heavy cream
  • 1 tsp Pure vanilla extract
  • ½ tsp Ground cinnamon
  • ¼ tsp Ground nutmeg
  • ¼ tsp Salt
  • For the Topping
  • 1 cup Mini marshmallows or enough to fully cover the casserole dish
  • ¼ cup Chopped pecans Optional, for a nutty crunch
  • 1 tbsp Pure maple syrup Optional drizzle

Method
 

  1. Step 1: Roast the Sweet Potatoes
  2. Preheat your oven to 375°F (190°C).
  3. Wash the fresh sweet potatoes thoroughly and pierce them with a fork in a few spots to release steam.
  4. Place them on a baking sheet and roast for 45 to 60 minutes or until completely tender.
  5. Remove from the oven and allow them to cool enough to handle safely.
  6. Step 2: Mash & Mix
  7. Peel the skins off the roasted sweet potatoes and transfer the warm flesh into a large mixing bowl.
  8. Mash them with a fork or a potato masher until perfectly smooth.
  9. Add the melted unsalted butter, brown sugar, heavy cream, vanilla extract, ground cinnamon, nutmeg, and salt.
  10. Stir thoroughly until the mixture becomes rich, creamy, and completely well-combined.
  11. Step 3: Assemble & Bake
  12. Lightly grease a standard baking casserole dish and spread the sweet potato mixture evenly into it, smoothing the top with a spatula.
  13. Sprinkle mini marshmallows generously across the entire surface, ensuring even coverage.
  14. Optional: Sprinkle chopped pecans and drizzle a bit of maple syrup over the marshmallows for extra flavor depth.
  15. Place the dish back into the preheated oven and bake for 15-20 minutes, keeping a close eye on it until the marshmallows turn puffy, golden brown, and gooey.
  16. Remove from the oven, let it rest/cool for a few minutes, and serve warm!