If you’re craving a comforting dish that captures the essence of cozy family dinners and holiday festivities, this Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe is an absolute must-try. It brings together creamy, naturally sweet mashed sweet potatoes bathed in warm spices, topped with a crunchy pecan layer and a gooey blanket of golden marshmallows. Every bite is a delightful symphony of textures and flavors that has an uncanny way of making any meal feel like a celebration.

Ingredients You’ll Need

The image shows a white marbled surface with a round wire basket holding four large, orange sweet potatoes at the center. Surrounding the basket are clear glass bowls filled with different ingredients: a large bowl of small white marshmallows on the top right, a smaller bowl of light brown sugar on the bottom left, and a bowl of chopped pecans on the bottom center. There is also a clear small bowl of white flour and a tiny bowl of white salt on the right side. Two sticks of yellow butter wrapped in paper with blue text are placed at the top left, alongside a small clear bowl of dark vanilla extract and a clear bowl of reddish-brown cinnamon powder. A small square white bowl filled with a light brown spice, likely nutmeg, is on the top right. All items are neatly arranged and the light source comes from above. Photo taken with an iphone --ar 4:5 --v 7

This recipe calls for simple ingredients that are pantry staples, yet each plays a vital role in creating the rich taste and enticing texture of this dish. From the velvety sweet potatoes to the toasty pecan topping, every component comes together to deliver that perfect balance of sweet and nutty goodness.

4 large sweet potatoes (peeled and chopped into large chunks): The star of the dish providing creamy, natural sweetness and vibrant color.
½ cup unsalted butter: Adds richness and helps create a silky smooth sweet potato mash.
1 cup brown sugar: Sweetens the filling with deep molasses notes for warmth and depth.
½ teaspoon salt: Balances sweetness and enhances all the flavors.
½ teaspoon cinnamon: Brings a cozy, aromatic spice that complements sweet potatoes perfectly.
1 teaspoon vanilla extract: Adds subtle fragrant sweetness to round out the flavor profile.
¼ teaspoon nutmeg: Introduces a hint of earthiness and warmth essential for fall-inspired dishes.
4 tablespoons unsalted butter (melted): Used for the pecan topping to create a luscious, nutty crust.
⅓ cup brown sugar: Sweetens the pecan topping and helps it caramelize beautifully.
2 tablespoons all-purpose flour: Binds the topping ingredients for a crisp, cohesive texture.
½ teaspoon salt: Balances the topping flavors, preventing it from being overly sweet.
1 ¼ cups finely chopped pecan pieces: Adds crunch and earthy nuttiness that contrasts the smooth sweet potatoes.
10 oz mini marshmallows: The final crowning touch, melting to golden, pillowy perfection.

TIP

You’ll find the full ingredient list, instructions, and print option in the recipe card below.

How to Make Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe

Step 1: Prepare and Cook the Sweet Potatoes

Start by peeling and cutting your sweet potatoes into large chunks; this helps them cook evenly and mash up beautifully. Place them in a large saucepan, cover with water, and bring it to a boil. Boil until they become fork-tender—soft enough to fall apart easily—because that’s the foundation for your creamy mash.

Step 2: Mash the Sweet Potatoes and Mix in Flavors

After draining the cooked sweet potatoes, return them to the hot saucepan and add the unsalted butter. As it melts, use a potato masher to create a silky smooth base. Then, stir in brown sugar, salt, cinnamon, vanilla extract, and nutmeg until everything blends into a luscious, fragrant mixture that’s bursting with warmth and sweetness.

Step 3: Make the Pecan Topping

In a separate bowl, whisk together melted butter, brown sugar, all-purpose flour, salt, and finely chopped pecans. This mixture will become your crunchy, caramelized topping—perfectly contrasting the soft potatoes beneath.

Step 4: Assemble the Casserole

Lightly grease a 9 by 13-inch baking dish to prevent sticking. Spread the sweet potato mixture evenly across the bottom. Then, sprinkle the pecan topping layer on top, making sure it’s nicely distributed for that satisfying crunch in every bite.

Step 5: Add Marshmallows and Bake

Finally, cover the casserole with an even layer of mini marshmallows. Bake it in a preheated 350-degree oven for 25 to 35 minutes. Keep your eye on the marshmallows towards the end—they should melt and turn a beautiful golden brown without burning, creating that iconic gooey, toasted finish everyone loves.

How to Serve Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe

A close-up view of a baked dish featuring a dense layer of toasted marshmallows on top. The marshmallows are soft and puffy, packed tightly together, and have a light golden brown color on their rounded tops, while the sides remain white and fluffy. The texture appears slightly crispy on the browned parts with a soft and pillowy feel overall. The dish is placed on a white marbled surface in soft natural light, highlighting the warm tones of the toasted marshmallows photo taken with an iphone --ar 4:5 --v 7

Garnishes

While the dish shines as is, a sprinkle of freshly chopped parsley or a light dusting of cinnamon powder can add a fresh color contrast and a hint of extra flavor. For an extra touch of decadence, drizzle a little maple syrup over the top just before serving for an irresistible, glossy finish.

Side Dishes

This casserole pairs beautifully with savory mains like roasted turkey, honey-glazed ham, or even a juicy grilled chicken breast. Its sweet, nutty richness complements seasonal veggies like green beans almondine or cranberry sauce, making your meal festive and balanced.

Creative Ways to Present

For a fun twist, serve this recipe in individual ramekins for single servings—perfect for holiday dinners or potlucks. You can also customize the pecan topping with toasted coconut flakes or swap in walnuts for a different crunch. The marshmallow layer can be broiled briefly at the end for a darker, more toasted flavor that’s sure to impress.

Make Ahead and Storage

Storing Leftovers

Leftover Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe keeps well in an airtight container in the refrigerator for up to 4 days. Simply cover tightly with foil or plastic wrap to maintain its moisture and flavor.

Freezing

You can freeze this casserole—just be sure to assemble it fully but hold off on baking and adding marshmallows. Wrap it well in plastic wrap and foil, then freeze for up to 2 months. When ready, bake from frozen, adding marshmallows in the last 10 minutes so they don’t overcook.

Reheating

Reheat leftovers in a 350-degree oven until warmed through, about 20 minutes. For the best texture, add a fresh batch of mini marshmallows in the last 5 minutes to restore that melty, golden top layer that makes this dish so special.

FAQs

Can I use canned sweet potatoes instead of fresh?

While fresh sweet potatoes provide the best texture and flavor, canned sweet potatoes can be used in a pinch. Just be sure to drain them well and mash thoroughly to avoid a watery filling.

What can I substitute if I don’t have pecans?

Walnuts or almonds make excellent substitutes, offering a similar crunch and nutty flavor. Toast them lightly beforehand to enhance their taste.

Is it necessary to use marshmallows?

Marshmallows add the classic sweet, melty topping this recipe is known for, but you can skip or replace them with a sprinkle of brown sugar and extra pecans for a different but equally delicious finish.

Can this Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe be made vegan?

Yes! Substitute butter with vegan butter or coconut oil and use a plant-based marshmallow alternative. Make sure all other ingredients are free from animal products for a fully vegan dish.

How far ahead can I prepare this dish before baking?

You can assemble the casserole (without the marshmallows on top) up to a day in advance and keep it refrigerated. Add the marshmallows just before baking for the freshest, best-looking topping.

Final Thoughts

This Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe is one of those timeless dishes that never fails to bring smiles around the table. Whether it’s a holiday tradition or a special family meal, the blend of sweet, creamy potatoes with crunchy pecans and toasted marshmallows creates a comforting dish you’ll want to make again and again. Go ahead and try it—you might just find your new favorite way to enjoy sweet potatoes!

Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe

Ingredients You’ll Need

How to Make Sweet Potato Casserole with Marshmallows and Pecan Topping Recipe

Step 1: Prepare and Cook the Sweet Potatoes