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A close up shot of a spoon sticking out of a sweet potato casserole with marshmallows on top.

Sweet Potato Casserole with Marshmallows

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 6 reviews
  • Author: Erin Jensen
  • Prep Time: 20 minutes
  • Cook Time: 25 minutes
  • Total Time: 45 minutes
  • Yield: 12 servings 1x
  • Category: Side Dish
  • Method: Stove Top + Oven
  • Cuisine: American


Sweet Potato Casserole with Marshmallows – this sweet potato casserole with marshmallows recipe is a classic Thanksgiving side dish + so easy!


  • 2 1/2 pounds sweet potatoes, peeled and cut into 2 inch cubes
  • 4 tablespoons butter (vegan butter works)
  • 2 eggs
  • 1/4 cup full fat coconut milk or heavy cream (unsweetened almond milk works)
  • 1/4 cup real maple syrup
  • 1/41/2 cup brown sugar or coconut sugar
  • 1/2 teaspoon kosher salt
  • 1/4 teaspoon ground cinnamon
  • 1/4 teaspoon ground nutmeg
  • 1 teaspoon vanilla extract
  • mini marshmallows for topping


  1. Preheat oven to 350°F.
  2. Bring a large pot of water to boil. Carefully add the sweet potatoes and let simmer until they are very soft; approx. 15-20 minutes. Drain.
  3. Add boiled sweet potatoes to a medium mixing bowl along with the butter, eggs, milk, maple syrup, sugar, salt, cinnamon, nutmeg and vanilla extract. Mash together until you have reached your desired consistency – use a hand masher for a rougher texture or a electric hand mixer for a smoother texture.
  4. Pour out into an 11-inch round casserole dish (or comparable baking dish). 
  5. Place marshmallows on top in a single layer. 
  6. Place in the oven, middle rack and uncovered, for 20-30 minutes or until marshmallows are slightly brown. 
  7. Remove and let cool slightly before serving.


  • Storage: store leftovers in an airtight container in the refrigerator for up to 3-4 days.
  • Add-ins: feel free to add in some pecans (candied or regular) either into the sweet potato mixture or sprinkled on top. 
  • Peeled potatoes: you don’t have to peel the potatoes if you prefer not to.