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Sweet Potato Casserole with Pecan Topping and Marshmallows Recipe

Published: Mar 19, 2026 by Hazel · This post may contain affiliate links · Leave a Comment

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If you’re on the lookout for a crowd-pleasing, heartwarming recipe that combines silky sweet potatoes, crunchy pecans, and melt-in-your-mouth marshmallows, you have to try this Sweet Potato Casserole with Pecan Topping and Marshmallows Recipe. It’s a celebration of textures and flavors that sings holiday comfort but is honestly a perfect anytime indulgence. The creamy spiced sweet potato base gives way to a luscious topping that’s both buttery and delightfully sweet, making every bite feel like a warm hug. Trust me, once you make it, this casserole will find its permanent spot on your table.

Ingredients You'll Need

The image shows seven clear glass bowls and a glass measuring cup arranged neatly on a white marbled surface. In the largest bowl on the right, there are many small cubes of orange sweet potato. Next to it, a medium bowl contains white granulated sugar. Above that, the glass measuring cup holds white milk. To the left of the sugar, a smaller bowl has two brown eggs. Above the eggs is a bowl with several small chunks of yellow butter. Near the butter is a tiny bowl of white salt, and below is a small bowl of dark brown vanilla extract. The overall composition is clean and minimal, with all containers transparent and clearly showing the contents photo taken with an iphone --ar 4:5 --v 7

The magic of this Sweet Potato Casserole with Pecan Topping and Marshmallows Recipe lies in its simple but thoughtfully chosen ingredients. Each element brings its unique character: from the natural sweetness and creaminess of the sweet potatoes to the satisfying crunch of pecans, and that nostalgic gooey marshmallow finish that everyone loves.

  • Sweet potatoes (4 large, peeled and cubed): The creamy, naturally sweet base that makes this dish irresistible.
  • Unsalted butter (½ cup melted): Adds richness and helps create that smooth, luscious texture.
  • Brown sugar (½ cup packed for base, ½ cup for topping): Deep, molassesy sweetness to balance the spices and nuts.
  • Heavy cream or whole milk (⅓ cup): Brings moisture and silkiness to the mashed sweet potatoes.
  • Eggs (2 large, lightly beaten): Bind everything together for a custard-like consistency.
  • Vanilla extract (1 tsp): A subtle background note that enhances the natural flavors.
  • Ground cinnamon (1 tsp): Warm spice that pairs perfectly with sweet potatoes.
  • Ground nutmeg (½ tsp): Adds depth and a hint of earthiness.
  • Salt (¼ tsp): Essential for balancing sweetness and enhancing flavors.
  • All-purpose flour (½ cup): Used in the topping to create that crumbly, crunchy texture.
  • Chopped pecans (1 cup): Provides a toasty crunch that complements the creamy base beautifully.
  • Mini marshmallows (3 cups, optional): For that classic gooey topping that everyone dreams of on their sweet potato casserole.

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

Step 1: Prepare the Sweet Potatoes

Start by peeling and cubing your sweet potatoes into evenly sized pieces so they cook uniformly. Boil them in salted water for about 15 to 20 minutes until they’re tender enough to mash with ease. Draining them thoroughly is key to avoid any watery consistency later on — you want a nice thick, creamy base to shine through.

Step 2: Create the Creamy Base

Once the potatoes are perfectly cooked and drained, mash them until smooth and velvety. Stir in melted butter, brown sugar, heavy cream or milk, eggs, vanilla extract, cinnamon, nutmeg, and a pinch of salt. Each ingredient layers flavor and texture, turning the potatoes into a rich and fragrant mixture. Spread this mixture evenly in a greased 9×13-inch baking dish, setting the stage for your irresistible toppings.

Step 3: Prepare the Pecan Topping

In a mixing bowl, combine flour, brown sugar, melted butter, and chopped pecans. Use your fingers or a fork to create a crumbly texture. When spread over the sweet potato base, this topping will bake into a golden, buttery crust that adds a wonderful crunch—pure comfort in every bite! Alternatively, you can skip the pecan topping and top the casserole with three cups of mini marshmallows for a toasty, gooey finish that’s equally delightful.

Step 4: Bake to Perfection

Preheat your oven to 350°F (175°C). Bake the casserole uncovered for about 30 to 35 minutes. If you’ve chosen the pecan topping, look for a beautiful golden brown crust; if marshmallows are your pick, bake until they’re puffed and toasted a lovely golden color. Let the casserole rest for about 10 minutes once out of the oven so all those flavors can settle beautifully before serving.

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

The image shows a round clear glass dish filled with a three-layer sweet potato casserole. The bottom layer is a smooth, bright orange mashed sweet potato mixture. The middle layer is a white creamy sauce that spreads evenly across the sweet potatoes. The top layer is a crumbly golden brown streusel topping with scattered pecan halves, adding a crunchy texture and dark brown color contrast. The dish is placed on a white marbled surface with soft natural light, highlighting the warm colors and textures of the casserole. photo taken with an iphone --ar 4:5 --v 7

Garnishes

While the casserole shines on its own, a sprinkle of fresh chopped pecans over a marshmallow topping adds extra texture and visual appeal. A dash of cinnamon or freshly grated nutmeg on top right before serving also enhances the aroma and invites eager diners to dig in.

Side Dishes

This Sweet Potato Casserole with Pecan Topping and Marshmallows Recipe pairs brilliantly with savory mains like roasted turkey, glazed ham, or grilled chicken. For a balanced meal, add a crisp green salad or steamed vegetables such as green beans or Brussels sprouts—this way you get a full spectrum of textures and flavors on your plate.

Creative Ways to Present

For festive occasions, serve the casserole in a rustic ceramic dish or individual ramekins for charming personal portions. You can also bake it inside small mini cast iron skillets to keep it warm and add a cozy touch to your table setting. Drizzling a little maple syrup before serving can add an elegant sweetness twist that’s hard to resist!

Make Ahead and Storage

Storing Leftovers

Leftover sweet potato casserole keeps well in the refrigerator for up to 4 days. Cover it tightly with plastic wrap or transfer to an airtight container to prevent it from drying out. When ready to enjoy again, the flavors will have merged even more, making leftovers equally delicious.

Freezing

You can freeze this casserole either before baking (assemble base and topping, then freeze) or after baking and cooling completely. Wrap tightly in foil and plastic wrap or use freezer-safe containers to avoid freezer burn. It will stay good for up to 3 months. Just remember to label your package so you know what treasure you have waiting!

Reheating

Reheat leftovers covered in a 325°F (160°C) oven for about 20–25 minutes until warmed through. If you froze it pre-baked, you can bake it straight from frozen but add extra time to ensure it’s heated all the way through. To revive marshmallows, broiling for just a couple of minutes at the end gives that toasty finish again.

FAQs

Can I make this casserole vegan?

Absolutely! Swap the butter for coconut oil or vegan margarine, use a plant-based milk for the cream, and replace eggs with flax eggs or a commercial egg substitute. Skip marshmallows unless you find vegan-friendly ones to maintain the classic topping.

What’s the best type of sweet potato for this recipe?

Look for bright orange-fleshed sweet potatoes—they are naturally sweeter and moister, which enriches the texture and flavor of the casserole perfectly.

Can I prepare this casserole a day ahead?

Yes, you can prepare both the sweet potato base and the pecan topping separately up to one day ahead. Assemble it just before baking for the best texture and freshness.

Is it necessary to use pecans in the topping?

Pecans add wonderful crunch and flavor, but if you have allergies or prefer something different, walnuts or even almonds work well. You can also stick to marshmallows alone for a classic touch.

How do I prevent the casserole from being watery?

Draining the sweet potatoes thoroughly after boiling is essential to avoid excess water. Also, avoid adding too much cream or milk—just enough to make the mash creamy but not soupy.

Final Thoughts

This Sweet Potato Casserole with Pecan Topping and Marshmallows Recipe is truly a gem that brings warmth and happiness to any meal. Whether you're making it for holiday gatherings or a cozy weeknight side, its combination of creamy, crunchy, and sweet flavors never fails to delight. Give it a try—you might just find your new favorite comfort dish!

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Sweet Potato Casserole with Pecan Topping and Marshmallows Recipe

Sweet Potato Casserole with Pecan Topping and Marshmallows Recipe


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4.1 from 4 reviews

  • Author: Hazel
  • Total Time: 55 minutes
  • Yield: 8–10 servings
  • Diet: Vegetarian
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Description

This Yummy Sweet Potato Casserole is a creamy, spiced dish featuring mashed sweet potatoes blended with warm spices and topped with a crunchy pecan streusel or gooey marshmallows. Perfect for holiday gatherings, Sunday dinners, or any time you want a comforting, sweet side dish that pairs beautifully with festive meals.


Ingredients

For the Sweet Potato Base:

  • 4 large sweet potatoes (about 3 lbs / 1.3 kg), peeled and cubed
  • ½ cup (115 g) unsalted butter, melted
  • ½ cup (100 g) brown sugar, packed
  • ⅓ cup (80 ml) heavy cream or whole milk
  • 2 large eggs, lightly beaten
  • 1 tsp vanilla extract
  • 1 tsp ground cinnamon
  • ½ tsp ground nutmeg
  • ¼ tsp salt

For the Pecan Topping:

  • ½ cup (65 g) all-purpose flour
  • ½ cup (100 g) brown sugar, packed
  • 4 tbsp (60 g) unsalted butter, melted
  • 1 cup (120 g) chopped pecans

Optional Marshmallow Topping:

  • 3 cups (150 g) mini marshmallows


Instructions

  1. Cook Potatoes: Place peeled and cubed sweet potatoes in a pot of salted water. Boil for 15–20 minutes until the potatoes are fork-tender. Drain the potatoes thoroughly to avoid a watery base for your casserole.
  2. Make Base: Mash the drained sweet potatoes until smooth. Stir in the melted butter, brown sugar, heavy cream or milk, beaten eggs, vanilla extract, ground cinnamon, ground nutmeg, and salt until well combined. Spread this mixture evenly into a greased 9×13-inch baking dish.
  3. Prepare Topping: In a bowl, mix together the flour, brown sugar, melted butter, and chopped pecans until the mixture becomes crumbly. Sprinkle this pecan topping evenly over the sweet potato base. Alternatively, if you prefer, top the casserole with mini marshmallows instead of the pecan topping.
  4. Bake: Preheat the oven to 350°F (175°C). Bake the casserole uncovered for 30–35 minutes, or until the pecan topping is golden and crisp or the marshmallows are toasted and lightly browned.
  5. Serve: Allow the casserole to rest for 10 minutes before serving to set and enhance the flavors.

Notes

  • Drain potatoes well to avoid a watery base for the casserole.
  • Use fresh cinnamon and nutmeg for maximum flavor impact.
  • For a less sweet casserole, reduce the amount of sugar or skip the marshmallow topping.
  • You can prepare the sweet potato base and the topping separately up to one day ahead; simply assemble and bake the casserole when ready.
  • Prep Time: 20 minutes
  • Cook Time: 35 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American Comfort Food

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I’m Hazel, and I created Recipes By Hazel to share the kind of food that feels like home — warm, comforting, and full of meaning.

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