Sweet Potato Casserole with Marshmallows

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Sweet Potato Casserole with Marshmallows is the perfect combination of smooth and creamy sweet potatoes topped with a gooey layer of marshmallows. The marshmallows get a little crunchy around the edges and they are my favorite part.

Prep Time: 1 hour 5 minutes | Cook Time: 40 minutes | Total Time: 1 hour 45 minutes



  • 3 pounds sweet potatoes, about 5 medium
  • 3/4 cup packed light brown sugar
  • 1/3 cup butter, softened
  • 1 large egg
  • 1/2 teaspoon vanilla extract
  • 1/2 teaspoon salt
  • 1/4 teaspoon cinnamon
  • 1 (10-ounce) bag mini marshmallows


  1. Preheat oven to 400 degrees. Bake sweet potatoes for 1 hour or until tender. (Sweet potatoes sometimes ooze and make a mess in the oven. I cover a baking sheet with aluminum foil for easy clean up and place the sweet potatoes on it.)
  2. Reduce oven temperature to 350 degrees.
  3. Let sweet potatoes cool some and then peel the skin off. Place peeled sweet potatoes in a mixing bowl.
  4. Add brown sugar, butter, egg, vanilla, salt, and cinnamon.
  5. Beat with an electric mixer until smooth.
  6. Transfer sweet potato mixture to a greased 11×7-inch baking dish.
  7. Bake for 30 minutes. Remover from oven and sprinkle marshmallows on top. Return to oven for 10 minutes.

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