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Sweet Potato Casserole with a corner missing
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5 from 1 vote

Sweet Potato Casserole (Pecan Streusel and Marshmallows)

This Sweet Potato Casserole with Marshmallows and Pecans is the best of both worlds. Buttery, cinnamon-spiced sweet potato mash is topped with a sweet pecan streusel and finished with marshmallows toasted to golden brown perfection. Perfect for Christmas and Thanksgiving. Make ahead instructions included!
Prep Time20 minutes
Cook Time40 minutes
Total Time1 hour
Course: Side Dish
Cuisine: American
Keyword: sweet potato casserole with marshmallows, sweet potato casserole with marshmallows and pecans, sweet potato casserole with pecan topping
Servings: 12 servings
Calories: 412kcal
Author: Jill

Ingredients

Sweet Potatoes

  • 6 large sweet potatoes
  • 1/2 cup (1 stick) butter softened
  • 1/2 cup milk or cream
  • 1 teaspoon ground cinnamon
  • 1/2 teaspoon salt

Topping

Instructions

  • Wash, peel, and cut the sweet potatoes into 1-inch chunks. Place the sweet potatoes into a large pot and cover with water. Heat the pot on the stove over high heat until boiling. Reduce the heat to medium-high and simmer until the sweet potatoes are fork-tender.
  • Pour the sweet potatoes into a colander to drain off the water, then return the sweet potatoes to the pot. Add the butter, milk/cream, cinnamon, and salt. Mash well with a potato masher or whip with an electric mixer.
  • Preheat the oven to 375ºF. Grease a 3-quart baking dish with non-stick cooking spray.
  • Spread the mashed sweet potatoes evenly in the prepared baking dish.
  • In a medium mixing bowl, combine the butter, flour, brown sugar, and cinnamon with a fork until crumbly. Stir in the chopped pecans. 
  • Sprinkle the streusel topping over the sweet potatoes.
  • Bake the casserole at 375ºF for 10-12 minutes until hot. Top with the mini marshmallows then bake for an additional 5-6 minutes until the marshmallows are toasted golden brown on top. Watch the marshmallows closely while baking; they can burn quickly!
  • Remove the casserole from the oven and cool for 5 minutes before serving.

Nutrition

Calories: 412kcal | Carbohydrates: 56g | Protein: 4g | Fat: 20g | Saturated Fat: 10g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 7g | Trans Fat: 1g | Cholesterol: 42mg | Sodium: 325mg | Potassium: 638mg | Fiber: 6g | Sugar: 22g | Vitamin A: 24612IU | Vitamin C: 4mg | Calcium: 84mg | Iron: 2mg