The Story Behind Sweet Potato Casserole

Sweet Potato Casserole with Marshmallows is one of the most distinctly American Thanksgiving dishes — and the marshmallow topping has a fascinating industrial origin. Sweet potatoes (Ipomoea batatas) have been cultivated in the Americas for over 5,000 years and were a staple crop for indigenous peoples throughout North and South America. They arrived in Africa via the Columbian Exchange and became deeply embedded in African American foodways — which is why sweet potato preparations are so central to the soul food tradition and, by extension, the American Thanksgiving table. The marshmallow topping was introduced in 1917, when the Angelus Marshmallow Company published a promotional cookbook featuring recipes designed to boost marshmallow consumption. The combination stuck — and became one of America's most polarizing Thanksgiving traditions, beloved by some and baffling to everyone else. Whether you're Team Marshmallow or Team Pecan Crumble, the sweet potato casserole remains a quintessentially American dish.

Time and Servings:

  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Total Time: 45 minutes
  • Servings: 8 servings

Nutrition (per serving):

  • Calories: 250 kcal
  • Protein: 4g
  • Fat: 6g
  • Carbohydrates: 45g
  • Fiber: 5g
  • Sodium: 300mg

Ingredients:

  • 4 large sweet potatoes, peeled and cubed
  • 1/4 cup brown sugar
  • 1/4 cup butter, melted
  • 1/2 cup milk
  • 1 tsp vanilla extract
  • 1 cup mini marshmallows

Instructions:

  1. Prepare the Sweet Potatoes:
    • Place the cubed sweet potatoes in a large pot and cover with water.
    • Bring to a boil over medium-high heat and cook for 15-20 minutes, or until the potatoes are fork-tender.
    • Drain the potatoes and transfer them to a large mixing bowl.
  2. Mash the Sweet Potatoes:
    • Mash the cooked sweet potatoes until smooth using a potato masher or an electric mixer.
    • Stir in 1/4 cup of brown sugar, 1/4 cup of melted butter, 1/2 cup of milk, and 1 tsp of vanilla extract until well combined.
  3. Assemble the Casserole:
    • Preheat your oven to 350°F (175°C).
    • Grease a 9x13-inch baking dish and spread the sweet potato mixture evenly into the dish.
    • Sprinkle 1 cup of mini marshmallows evenly over the top.
  4. Bake the Casserole:
    • Bake in the preheated oven for 25-30 minutes, or until the marshmallows are golden brown and slightly toasted.
  5. Serve:
    • Remove the casserole from the oven and let it rest for 5 minutes before serving.
    • Serve warm as a sweet and creamy side dish for your Thanksgiving feast.

Tips for Success:

  • Add a pinch of cinnamon or nutmeg to the sweet potato mixture for extra warmth and flavor.
  • For a crunchy twist, sprinkle chopped pecans or walnuts over the marshmallows before baking.
  • Use canned sweet potatoes if you’re short on time—just reduce the cooking time accordingly.

Wine, Cocktail, or Drink Pairing:

  • Pair this sweet side dish with a sweet Riesling, a spiced apple cider, or a light sparkling rosé for a festive and flavorful combination.