Classic Sweet Potato Casserole with Marshmallows Recipe

A baked sweet potato casserole in a ceramic dish topped with golden brown toasted marshmallows.
Sweet, creamy sweet potatoes topped with gooey, toasted marshmallows – a holiday favorite.

Every family has that one dish that signals the start of the holidays. For mine, it’s the Sweet Potato Casserole with Marshmallows. The moment it comes out of the oven, golden and bubbling, it fills the kitchen with that unmistakable mix of brown sugar and cinnamon — sweet, warm, and nostalgic.

This recipe is a tribute to tradition, yet it’s simple enough for busy cooks. Whether it’s your first Thanksgiving dinner or your fiftieth, this casserole turns a humble root vegetable into a star dish. It’s comfort food that bridges generations, reminding us that the best memories are often baked with love.

Why This Sweet Potato Casserole with Marshmallows Works

  • Perfect Flavor Balance: Sweet potatoes provide natural sweetness, while brown sugar and butter add depth. The toasted marshmallow topping gives a dessert-like finish that’s irresistible but not overpowering.
  • Creamy, Fluffy Texture: Mashing the potatoes until smooth creates a rich, creamy consistency. Adding milk and eggs helps bind the mixture without making it heavy.
  • Nostalgic and Crowd-Pleasing: Each bite is familiar and indulgent — a side dish that feels like dessert yet complements turkey, ham, or roast chicken perfectly.
  • Easy and Make-Ahead Friendly: The base can be prepared a day in advance, refrigerated, and baked fresh before serving, saving time while keeping that homemade flavor.

Sweet Potato Casserole with Marshmallows Recipe

Recipe at a Glance

Prep TimeCook TimeTotal TimeServingsCuisineDifficulty
20 mins30 mins50 mins8 servingsAmericanEasy

Equipment – Amazon’s Overall Picks

You don’t need fancy tools to make this dish perfect, but the right equipment makes a difference:

Le Creuset Stoneware Rectangular Dish

Upgrade Your Holiday Baking

Make every casserole perfect with the Le Creuset Stoneware Rectangular Dish with Platter Lid, 14 3/4″ x 9″, Caribbean. Durable, stylish, and oven-ready, it’s ideal for Thanksgiving favorites like sweet potato casserole.

Recommended Picks:
Le Creuset Stoneware Casserole Dish, OXO Good Grips Potato Masher, and Pyrex 3-Quart Baking Dish — durable, oven-safe, and ideal for holiday sides.

Sweet Potato Casserole with Marshmallows Ingredients

IngredientQuantity
Sweet potatoes4 large (about 2 lbs), peeled and cubed
Unsalted butter½ cup (1 stick), melted
Brown sugar½ cup
Milk¼ cup
Eggs2 large, lightly beaten
Vanilla extract1 tsp
Ground cinnamon½ tsp
Nutmeg¼ tsp
Salt¼ tsp
Mini marshmallows2 cups
Optional: chopped pecans½ cup

Ingredient Tips and Substitutes

  • Replace brown sugar with maple syrup for a richer caramel flavor.
  • For a dairy-free option, use almond milk and vegan butter.
  • Add chopped pecans or walnuts for a crunchy twist.
  • A dash of orange zest adds brightness to balance the sweetness.
Raw ingredients for sweet potato casserole including sweet potatoes, brown sugar, butter, eggs, vanilla, and mini marshmallows arranged on a countertop.
Fresh and simple ingredients to make a classic sweet potato casserole with marshmallows.

Recipe Instructions

  1. Preheat your oven to 350 °F (175 °C).
  2. Boil the sweet potatoes in salted water for about 15 minutes or until tender. Drain and mash.
  3. Combine mashed potatoes with melted butter, brown sugar, milk, eggs, vanilla, cinnamon, nutmeg, and salt. Mix until smooth.
  4. Pour mixture into a greased 9×13 baking dish and spread evenly.
  5. Top with mini marshmallows. For extra crunch, sprinkle pecans before adding marshmallows.
  6. Bake for 25–30 minutes until the marshmallows are golden and puffed.
  7. Cool slightly before serving warm.

This casserole can be reheated without losing its texture — just cover and bake for 10 minutes at 325 °F.

Chef’s Tips and Variations

  • Avoid over-mashing: Stop when smooth but not gluey.
  • To tone down sweetness: Mix half marshmallows and half pecans on top.
  • Make-ahead trick: Prepare the filling a day ahead, refrigerate, and add marshmallows before baking.
  • Add flavor depth: A pinch of salt or splash of bourbon gives the casserole a more complex taste.
  • Texture variation: For a crispy topping, mix brown sugar, butter, and oats beneath the marshmallows.

More Thanksgiving side dishes:

Nutrition Information

CaloriesProteinFatCarbohydratesFiberSodium
~320 kcal5 g9 g58 g5 g210 mg

Estimated per serving. Actual values may vary based on ingredients used.

A slice of sweet potato casserole served on a plate with toasted marshmallows on top, showing fluffy layers.
A cozy slice of sweet potato casserole with perfectly toasted marshmallows.

FAQs – Sweet Potato Casserole with Marshmallows

When to add marshmallows to sweet potato casserole?

Marshmallows should be added to the sweet potato casserole just before baking. Spread them evenly over the top of the mashed sweet potato mixture, then bake until they are golden and puffed, usually in the last 25–30 minutes of cooking. Adding them too early can cause them to melt completely and burn.

What is the dish called with sweet potatoes and marshmallows?

People commonly call the dish Sweet Potato Casserole with Marshmallows, and families serve it as a classic Thanksgiving or holiday side in the United States. In some regions, they also refer to it as marshmallow-topped sweet potatoes.

What is in Ruth’s Chris sweet potato casserole?

Ruth’s Chris sweet potato casserole features mashed sweet potatoes blended with sugar, butter, cream, and spices, then topped with a brown sugar–pecan crust or marshmallows, baked until golden. It combines creamy sweet potatoes with a crunchy, sweet topping for a signature rich flavor.

What does Texas Roadhouse put on their loaded sweet potatoes?

At Texas Roadhouse, loaded sweet potatoes are topped with butter, brown sugar, cinnamon, and toasted marshmallows. Some versions include honey butter or caramel drizzle, giving them a sweet, rich, and slightly crispy topping that’s a crowd favorite.

Bringing Comfort Home

The Classic Sweet Potato Casserole with Marshmallows is more than a side dish — it’s a celebration of tradition and togetherness. Every year, it reappears at family gatherings, bridging generations with its warmth and simplicity. Whether you’re hosting a Thanksgiving feast or craving a comforting weekend bake, this recipe brings the spirit of the holidays to your table — one creamy, marshmallow-topped bite at a time.


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