The rich aroma of sweet potatoes baking in the oven takes me back to family gatherings, where laughter and love blend seamlessly with delicious food. This Marshmallow Sweet Potato Casserole is not just a dish; it’s a nostalgic hug for your taste buds, perfectly sweetened and creamy, topped with either fluffy marshmallows or crunchy pecans. The beauty of this recipe lies in its versatility—serving as both a comforting holiday side and a delightful dessert, making it ideal for any occasion. With quick prep and family-friendly appeal, it’s a guaranteed crowd-pleaser that everyone will come back for seconds! Curious how this dish can elevate your next dinner? Let’s dive in!

Why is this casserole a must-try?
Comforting and nostalgic, this Marshmallow Sweet Potato Casserole brings warmth to your table with every bite. Versatile enough to act as a holiday side dish or a sweet treat, it’s perfect for any gathering. Quick prep ensures you won’t spend hours in the kitchen, while the delightful flavor of sweet potatoes paired with either marshmallows or pecans guarantees satisfaction. Family-friendly and beloved by all ages, this dish is your ticket to turning a mundane meal into a cherished memory. Plus, if you’re looking for more sweet potato inspiration, check out these delicious recipes like Sweet Potato Casserole or Sweet Potato Pie.
Marshmallow Sweet Potato Casserole Ingredients
For the Casserole
- Yams – Canned yams are preferred for convenience, providing a sweet and creamy base.
- Butter – Ensure it’s melted to easily mix into the sweet potato mixture.
- Granulated Sugar – This sweetens the filling; adjust if using sweeter toppings, like marshmallows.
- Milk – Contributes to a creamy texture; non-dairy alternatives can work well as substitutes.
- Eggs – Fresh eggs act as a binder that helps the casserole hold together.
- Vanilla Extract – Use pure vanilla for the best flavor enhancement in your casserole.
For the Pecan Topping
- Pecan Pieces – Adds a delightful crunch; can replace with walnuts for a different nuttiness.
- Brown Sugar – Deepens the flavor and sweetness of the topping.
- All-Purpose Flour – Binds the topping together for a lovely clumpy texture; gluten-free flour can be used as a substitute.
For the Marshmallow Finish (optional)
- Mini Marshmallows – These add a sweet, fluffy finish; sprinkle in the last 5 minutes of baking for best results.
Step‑by‑Step Instructions for Marshmallow Sweet Potato Casserole
Step 1: Preheat and Prepare
Start by preheating your oven to 350°F (175°C). While waiting, butter an 8×8 inch baking dish generously. This will help the Marshmallow Sweet Potato Casserole come out easily after baking. Make sure the butter covers all corners to avoid any sticky situations later!
Step 2: Cook the Yams
In a medium pot, combine your canned yams along with their liquid. Bring to a gentle boil and simmer until fork-tender, about 10-15 minutes. Carefully drain the yams well to eliminate excess moisture, which helps keep your casserole creamy and delicious.
Step 3: Mash the Yams
Transfer the drained yams to a mixing bowl and mash them until smooth, using a fork or potato masher. Incorporate the granulated sugar, melted butter, milk, eggs, and vanilla extract, blending until creamy and well combined. This rich mixture forms the flavorful base of your Marshmallow Sweet Potato Casserole.
Step 4: Assemble the Casserole
Spread the sweet potato mixture evenly into the greased baking dish, smoothing the top with a spatula. This forms a cozy bed that will hold all the deliciousness of the casserole. Once spread, give it a little shake to level it down before moving on to the topping.
Step 5: Make the Pecan Topping
In a separate bowl, mix together the pecan pieces, brown sugar, flour, and melted butter. The goal is to achieve a crumbly texture that will create a delightful topping. Once your mixture resembles wet sand, you’re ready to add it on top of the sweet potato base for extra crunch.
Step 6: Bake the Casserole
Carefully sprinkle the pecan topping over the sweet potato mixture. Place the baking dish in your preheated oven and bake for 45 minutes, or until the topping is golden brown and the casserole is bubbling slightly. The aromas of sweet potatoes and pecans will fill your kitchen!
Step 7: Add Marshmallows
For the final touch, remove your casserole from the oven and sprinkle mini marshmallows on top. Return the dish to the oven for an additional 5 minutes, allowing the marshmallows to puff up and turn a beautiful golden brown. This creates the sweet, sticky layer that rounds out your Marshmallow Sweet Potato Casserole.
Step 8: Cool and Serve
Once baked, let the casserole cool for about 15 minutes to help it set and make cutting easier. This resting period is crucial to achieving the perfect texture. Now your Marshmallow Sweet Potato Casserole is ready to be served, a comforting addition to any meal!

What to Serve with Marshmallow Sweet Potato Casserole
The warmth of baked sweet potatoes pairs beautifully with an array of satisfying accompaniments that will delight your family and friends.
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Roast Turkey: This classic main dish brings savory flavors that balance the sweet and creamy casserole, creating a perfect festive plate.
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Honey-Glazed Ham: The sweet glaze on the ham complements the casserole’s sweetness, making every bite a delightful experience.
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Green Bean Casserole: The crunch of fried onions from this dish offers a textural contrast, enhancing the overall meal with freshness and crunch.
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Cranberry Sauce: Its tartness cuts through the sweetness of the casserole, adding a bright pop of flavor to your holiday spread.
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Cornbread Muffins: Serve these warm and buttery muffins alongside the casserole for a comforting, Southern-inspired touch that harmonizes beautifully.
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Side Salad: A crisp green salad with a light vinaigrette brings a refreshing element, balancing the richness of both the casserole and your main dish. Toss in some nuts or fruits for extra flavor!
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Apple Crisp: For dessert, consider a warm apple crisp that’s slightly tart, providing a lovely contrast to the sweet potato casserole. The combination of textures is simply irresistible!
Each of these options not only complements the Marshmallow Sweet Potato Casserole but also enriches the dining experience, making your meal truly memorable.
Expert Tips for Marshmallow Sweet Potato Casserole
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Drain Well: Ensure yams are thoroughly drained after boiling to prevent a watery casserole. Excess liquid can ruin the texture.
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Heat Control: Keep an eye on the oven temperature to avoid over-baking. If the topping starts browning too quickly, cover it loosely with foil.
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Marshmallow Timing: Add mini marshmallows during the last 5 minutes of baking for a perfectly toasted top. This helps achieve the ideal texture without burning.
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Rest for Success: Allow the casserole to cool for 15 minutes before serving. This ensures easier cutting and a better overall texture for your Marshmallow Sweet Potato Casserole.
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Reheating Right: When reheating, cover the casserole with foil to keep it moist and bake at 350°F for 20-25 minutes. Add fresh marshmallows for the last 5 minutes for that delightful gooey finish.
Marshmallow Sweet Potato Casserole Variations
Feel free to get creative with this dish; the possibilities for customization make it truly special!
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Dairy-Free: Substitute regular milk with almond or oat milk to make it vegan-friendly.
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Nut-Free: Omit the pecans entirely or replace them with crispy rice cereal for a satisfying crunch.
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Spicy Kick: Add a pinch of cayenne pepper or smoked paprika to the sweet potato mixture for a surprising depth of flavor.
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Maple Twist: Instead of granulated sugar, sweeten the mixture with pure maple syrup for a rich, caramelized flavor. This enhances the overall sweetness beautifully!
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Tropical Vibe: Top with toasted coconut flakes instead of marshmallows for a fun twist. The coconut adds a delightful sweetness that pairs wonderfully with sweet potatoes.
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Flavor Boost: Stir in a teaspoon of ground cinnamon or nutmeg for a warm, aromatic touch that brightens the dish.
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Pretzel Crunch: For a unique topping, crush pretzels and combine with melted butter and sugar for sweet and salty crunch.
Try out these variations to create a Marshmallow Sweet Potato Casserole that best fits your family’s tastes! If you need more inspiration, consider making Sweet Potato Biscuits for a delightful side or even a savory Sweet Potato Rounds for a fun appetizer.
Make Ahead Options
These Marshmallow Sweet Potato Casserole ingredients are perfect for meal prep! You can prepare the sweet potato mixture (without the topping) up to 24 hours in advance by combining the drained, mashed yams with sugar, melted butter, milk, eggs, and vanilla. Store it in an airtight container in the refrigerator to keep it fresh. For the pecan topping, you can mix the dry ingredients (pecan pieces, brown sugar, flour) and keep them separately in a bowl. When you’re ready to bake, simply spread the sweet potato mixture in your greased baking dish, sprinkle the pecan topping on top, and bake as directed. This way, you can enjoy a comforting family favorite with minimal evening prep time!
How to Store and Freeze Marshmallow Sweet Potato Casserole
Fridge: Store the casserole covered in the fridge for up to 4 days. This keeps it fresh and ready for quick reheating during the week.
Freezer: For longer storage, freeze the casserole for up to 3 months. Make sure to wrap it tightly in plastic wrap and then foil to prevent freezer burn.
Reheating: When you’re ready to enjoy leftovers, cover the casserole with foil and reheat at 350°F for 20-25 minutes. If you used marshmallows, add fresh ones during the last 5 minutes of baking for that gooey topping.
Thawing: If frozen, thaw the casserole in the refrigerator overnight before reheating. This ensures it warms evenly and retains its delicious texture.

Marshmallow Sweet Potato Casserole Recipe FAQs
How do I choose the best yams for this casserole?
Absolutely! When selecting yams, look for those that are firm and free from bruises or dark spots. Fresh yams should feel heavy for their size; canned yams are also a great option for convenience. Just make sure to drain them well to avoid excess moisture in your casserole.
How should I store leftovers of the Marshmallow Sweet Potato Casserole?
Very! Store your casserole covered in the fridge for up to 4 days. Just be sure to let it cool down completely before covering it. If you want to keep it longer, the casserole can be frozen for up to 3 months. When freezing, wrap it tightly with plastic wrap followed by foil to prevent freezer burn.
Can I freeze the casserole if I’ve added marshmallows?
Certainly! If you decide to freeze your Marshmallow Sweet Potato Casserole, it’s best to add marshmallows after thawing. To freeze, wrap the casserole tightly and freeze for up to 3 months. When you’re ready to enjoy it, thaw in the fridge overnight and reheat, adding fresh marshmallows during the last few minutes of baking.
What should I do if my casserole turns out too watery?
If the casserole is too watery, ensure that the yams are well-drained before mashing. Excess moisture can lead to a soggy texture. If you find yourself in this situation, you can try adding a bit more flour or a small amount of cornstarch to absorb extra liquid during mixing. Be sure to follow the cooking instructions for thorough draining of the yams!
Is this casserole safe for people with nut allergies?
Absolutely! If you’re cooking for those with nut allergies, simply omit the pecans from the topping or replace them with crushed pretzels or an alternative crunchy option like gluten-free croutons. Just remember, if you include mini marshmallows, they’re typically nut-free, but always double-check the label to be safe. Enjoy worry-free cooking!

Marshmallow Sweet Potato Casserole: Comfort in Every Bite
Ingredients
Equipment
Method
- Preheat oven to 350°F (175°C) and butter an 8x8 inch baking dish.
- In a medium pot, combine canned yams and their liquid. Bring to a gentle boil and simmer until fork-tender, about 10-15 minutes. Drain well.
- Mash drained yams in a mixing bowl and add granulated sugar, melted butter, milk, eggs, and vanilla extract. Blend until creamy.
- Spread sweet potato mixture evenly into the greased baking dish.
- In a separate bowl, mix pecan pieces, brown sugar, flour, and melted butter until crumbly. Add on top of the sweet potato mixture.
- Bake for 45 minutes, or until the topping is golden brown and casserole is bubbling.
- Remove from oven and sprinkle mini marshmallows on top. Return to oven for an additional 5 minutes.
- Let cool for about 15 minutes before serving.

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