Classic Sweet Potato Casserole with Marshmallows Recipe

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 Time | Cook Time | Total Time | Servings | Cuisine | Difficulty |
|---|---|---|---|---|---|
| 20 mins | 30 mins | 50 mins | 8 servings | American | Easy |
Equipment – Amazon’s Overall Picks
You don’t need fancy tools to make this dish perfect, but the right equipment makes a difference:
- Potato masher or hand mixer for smooth consistency
- Mixing bowls for easy prep
- 9×13 casserole dish for even baking
- Measuring cups and spoons for precision
- Silicone spatula for mixing and spreading
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.
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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
| Ingredient | Quantity |
|---|---|
| Sweet potatoes | 4 large (about 2 lbs), peeled and cubed |
| Unsalted butter | ½ cup (1 stick), melted |
| Brown sugar | ½ cup |
| Milk | ¼ cup |
| Eggs | 2 large, lightly beaten |
| Vanilla extract | 1 tsp |
| Ground cinnamon | ½ tsp |
| Nutmeg | ¼ tsp |
| Salt | ¼ tsp |
| Mini marshmallows | 2 cups |
| Optional: chopped pecans | ½ 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.

Recipe Instructions
- Preheat your oven to 350 °F (175 °C).
- Boil the sweet potatoes in salted water for about 15 minutes or until tender. Drain and mash.
- Combine mashed potatoes with melted butter, brown sugar, milk, eggs, vanilla, cinnamon, nutmeg, and salt. Mix until smooth.
- Pour mixture into a greased 9×13 baking dish and spread evenly.
- Top with mini marshmallows. For extra crunch, sprinkle pecans before adding marshmallows.
- Bake for 25–30 minutes until the marshmallows are golden and puffed.
- 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:
- Sweet Potatoes -Rice -Pasta One Pot Meal
- The Best Classic Stuffing Recipe for Thanksgiving Dinner
- How to Make Pecan Pie from Scratch
Nutrition Information
| Calories | Protein | Fat | Carbohydrates | Fiber | Sodium |
|---|---|---|---|---|---|
| ~320 kcal | 5 g | 9 g | 58 g | 5 g | 210 mg |
Estimated per serving. Actual values may vary based on ingredients used.

FAQs – Sweet Potato Casserole with Marshmallows
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.
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.
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.
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.
Disclaimer: Nutritional information is provided as an estimate and may vary depending on ingredient brands. CookerDiary participates in the Amazon Services LLC Associates Program. As an Amazon Associate, we earn from qualifying purchases at no additional cost to you.
