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Classic Sweet Potato Casserole with Toasted Marshmallows

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A nostalgic, homemade sweet potato casserole featuring a creamy, spiced base made from roasted Garnet or Jewel sweet potatoes, topped with a golden, toasted jumbo marshmallow crust.

Ingredients

Scale
  • 3–4 lbs medium sweet potatoes (Garnet or Jewel varieties)
  • 1/2 cup unsalted butter, softened
  • 1/2 cup dark brown sugar, packed
  • 1/4 cup heavy cream
  • 2 large egg yolks
  • 1 tsp pure vanilla extract
  • 1 tsp ground cinnamon
  • 1/4 tsp ground nutmeg
  • 1 pinch salt
  • 1 bag large jumbo marshmallows

Instructions

  1. Preheat oven to 400°F (200°C). Line a rimmed baking sheet with parchment paper or foil.
  2. Wash sweet potatoes and pierce them several times with a fork. Place directly on the oven rack or on the prepared baking sheet.
  3. Roast sweet potatoes for 45-60 minutes until soft all the way through and easily squeezed.
  4. Let potatoes cool until safe to handle. Cut in half lengthwise and scoop the flesh into a large mixing bowl, discarding skins.
  5. Add softened butter, brown sugar, heavy cream, egg yolks, vanilla extract, cinnamon, nutmeg, and salt to the warm potato flesh.
  6. Mash the mixture until smooth and creamy, ensuring no lumps remain.
  7. Spread the potato mixture evenly into a 9×13 inch baking dish.
  8. Arrange jumbo marshmallows in a single layer over the potato mixture, covering the surface.
  9. Move oven rack to the top position and turn on the broiler.
  10. Broil the casserole for 3-5 minutes, watching closely, until marshmallows are golden brown. Rotate pan halfway through for even browning.
  11. Remove from oven and let cool for 10 minutes to allow the casserole to set before serving.

Notes

Roasting the sweet potatoes in their skins concentrates flavor and prevents excess moisture compared to boiling. Ensure butter and eggs are at room temperature to prevent separation. Watch the broiler closely as marshmallows burn quickly. For a vegan option, use vegan butter, oat cream, and vegan marshmallows.

Nutrition

Keywords: sweet potato casserole, toasted marshmallows, Thanksgiving side dish, holiday recipes, comfort food, roasted sweet potatoes, easy dessert side

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