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easy sweet potato casserole dish with mini marshmallow and pecan crumb topping in casserole dish with text overlay
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📋Sweet Potato Casserole With Marshmallows And Pecans

This sweet potato casserole is the perfect side dish for Thanksgiving and Christmas dinner. A classic dish with warming fall-flavored spices and topped with delicious pecan streusel and gooey mini marshmallows.
Prep Time15 mins
Cook Time1 hr
Course: Side Dish, Sides
Cuisine: American
Servings: 10 servings
Calories: 509kcal


For Potato Filling:

  • 2.5 lbs sweet potatoes peeled and diced into small cubes
  • ½ cup water
  • 2 eggs
  • ¾ cup light brown sugar
  • 4 tablespoon butter unsalted
  • 1 teaspoon vanilla
  • ¼ teaspoon salt
  • ¼ teaspoon clove powder
  • 1 teaspoon cinnamon powder
  • teaspoon nutmeg powder
  • ¼ cup pecans chopped

For Pecan Crumb & Marshmallow Toppings:

  • 1 cup pecans chopped
  • 1 cup light brown sugar
  • 4 tablespoon plain flour
  • ½ cup butter chilled cut into cubes
  • ¼ teaspoon clove powder
  • ½ teaspoon cinnamon powder
  • teaspoon nutmeg powder
  • ½ teaspoon vanilla extract
  • And
  • 2 cups mini marshmallows


To Make Potato Filling:

  • Peel sweet potatoes. Dice into small cubes. Add diced sweet potatoes into a pan, pour ½ cup water and bring it to a boil. Once starts boiling cover and cook on low flame until sweet potatoes are cooked through and tender. Will take around 12 to 15 minutes for the potatoes to cook.
  • Drain off any liquids left in the pot. Rest for a few minutes. This will help remove any excess water from the potatoes.
  • Transfer cooked sweet potatoes into a bowl. Mash it using a potato masher.
  • Add all ingredients – eggs, brown sugar, spices, vanilla, and chopped pecans to the bowl.
  • Beat using a hand blender or mash until fluffy and well blended.
  • Grease the casserole dish with butter on all sides. You can use cooking oil instead of butter to spray over the casserole dish.
  • Transfer potato filling into the prepared casserole/baking dish. Set aside.

Sweet Potato Casserole Topping - To Make Streusel Topping (pecan crumb):

  • Into a food processor add pecans, light brown sugar, chilled butter(cubed), plain flour, spice powder, and vanilla extract.
  • Pulse a few times until the crumble mixture resembles pea-sized crumbs.


  • Spread pecan crumb topping evenly over potato filling.
  • Bake in a preheated oven at 375 degrees Fahrenheit for 25 to 35 minutes until golden brown.

Marshmallow Topping:

  • Remove the baked sweet potato casserole from the oven. Spread mini marshmallows in a single layer. Bake in the oven for 5 to 10 minutes. If desired you can broil for 1 or 2 minutes. Make sure not to broil longer, marshmallows will burn quickly.
  • Serve immediately.



Nutritional Info – Please keep in mind that the nutritional information provided is only a rough estimate and can vary greatly based on the products used.


Calories: 509kcal | Carbohydrates: 73g | Protein: 5g | Fat: 24g | Saturated Fat: 10g | Cholesterol: 69mg | Sodium: 274mg | Potassium: 496mg | Fiber: 5g | Sugar: 48g | Vitamin A: 16564IU | Vitamin C: 3mg | Calcium: 86mg | Iron: 2mg