Creamy Sweet Potato Casserole Recipe with Marshmallows

Posted on November 18, 2025

The aroma of sweet potatoes baking in the oven, mingling with the warm, sugary smell of toasted marshmallows, is the essence of comfort food. Creamy sweet potato casserole is one of those dishes that makes you feel like you’re wrapped in a cozy blanket, no matter the season. It’s the perfect combination of creamy, smooth sweet potatoes and the light, airy sweetness of golden marshmallows. This dish is a staple at holiday dinners, but honestly, it’s so good you might find yourself making it for a regular Sunday meal too.

I’ve been making this recipe for years, and it never fails to impress. Whether it’s Thanksgiving, Christmas, or just a casual dinner with friends, this casserole is the star of the table. The best part? It’s easy to make and uses simple ingredients you probably already have in your pantry. I’ve tested this recipe countless times, tweaking it here and there, and I’m confident it’s the creamiest, dreamiest version you’ll ever taste.

If you’re ready to bring a little extra magic to your next gathering, this creamy sweet potato casserole with toasted marshmallows is the ultimate crowd-pleaser. Let’s dive in!

Why You’ll Love This Recipe

It’s a classic with a twist: Sweet potato casserole is a holiday favorite, but this version takes things up a notch with extra creaminess and perfectly toasted marshmallows.
Easy to make: You don’t need fancy equipment or skills to whip up this dish — just a little love and a few simple steps.
A delightful texture combo: The creamy sweet potatoes pair beautifully with the fluffy, gooey marshmallows on top.
Kid-approved: If you’ve got little ones at the table, trust me, they’ll be asking for seconds.
Perfect for gatherings: Whether it’s a holiday dinner or a potluck, this casserole is always a hit. It’s comforting, flavorful, and feels like a warm hug.

What sets this recipe apart is the attention to detail. Blending the sweet potatoes ensures they’re smooth as silk, and the addition of a touch of cinnamon and nutmeg creates a flavor profile that’s warm, cozy, and just the right amount of sweet. Plus, the marshmallows on top get perfectly golden and gooey, making every bite a delightful experience.

This dish isn’t just food — it’s a memory-maker. Whether you’re serving it at a holiday feast or just because, it’s one of those recipes that leaves everyone talking about how good it was. You might even find yourself sneaking bites straight from the pan!

What Ingredients You Will Need

This recipe uses simple, wholesome ingredients to create a dish that’s bursting with flavor and perfect for any occasion. Here’s what you’ll need:

Sweet potatoes: 3 pounds, peeled and cubed (choose medium-sized, firm sweet potatoes for the best flavor).
Unsalted butter: 4 tablespoons, melted (adds richness and creaminess).
Brown sugar: 1/2 cup, packed (for that deep, caramel-like sweetness).
Heavy cream: 1/4 cup (makes the potatoes extra creamy).
Vanilla extract: 1 teaspoon (adds a subtle, warm flavor).
Ground cinnamon: 1 teaspoon (for a hint of spice).
Ground nutmeg: 1/2 teaspoon (pairs beautifully with the sweet potatoes).
Salt: 1/2 teaspoon (balances the sweetness).
Eggs: 2, lightly beaten (helps bind everything together).
Mini marshmallows: 2 cups (the star of the show, adding that irresistible topping).

Feel free to make substitutions based on your dietary preferences. For example, you can use coconut cream instead of heavy cream for a dairy-free option or swap brown sugar for maple syrup for a slightly different flavor profile.

Equipment Needed

Large pot: For boiling the sweet potatoes.
Potato masher or hand mixer: To mash or blend the sweet potatoes into a creamy texture.
Mixing bowls: For combining ingredients.
Baking dish: A 9×13-inch dish works perfectly for this recipe.
Spatula: For spreading the potato mixture evenly.
Oven mitts: To safely remove the casserole from the oven.

If you don’t have a hand mixer, a sturdy potato masher will do the trick. Just be prepared for a bit of an arm workout! And if you don’t own a 9×13-inch dish, individual ramekins can be used for mini casseroles.

Preparation Method

Prepare the sweet potatoes: Peel and cube the sweet potatoes into even-sized pieces for faster cooking. Place them in a large pot and add enough water to cover. Bring to a boil and cook for 15-20 minutes until the potatoes are fork-tender.
Preheat the oven: While the sweet potatoes are boiling, preheat your oven to 375°F (190°C).
Drain and mash: Drain the sweet potatoes and transfer them to a large mixing bowl. Use a potato masher or hand mixer to mash them until smooth and creamy. If you prefer a lighter texture, a hand mixer will give you a fluffier result.
Mix the ingredients: Add the melted butter, brown sugar, heavy cream, vanilla extract, cinnamon, nutmeg, and salt to the mashed sweet potatoes. Stir until well combined. Then, add the beaten eggs and mix thoroughly.
Transfer to the baking dish: Grease your 9×13-inch baking dish with butter or cooking spray. Pour the sweet potato mixture into the dish, spreading it evenly with a spatula.
Add the marshmallows: Sprinkle the mini marshmallows evenly over the top of the sweet potato mixture.
Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the marshmallows are golden brown and the edges of the casserole are bubbling.
Cool and serve: Let the casserole cool for about 5 minutes before serving. This will allow the flavors to meld together and make it easier to serve.

Pro tip: If your marshmallows aren’t browning evenly, turn on the broiler for the last 1-2 minutes of baking. Keep a close eye to avoid burning!

Cooking Tips & Techniques

Making the perfect creamy sweet potato casserole is all about the details. Here are some tips to ensure your dish turns out beautifully:

Choose the right sweet potatoes: Look for firm, bright orange sweet potatoes without blemishes for the best flavor and texture.
Don’t skip the mashing step: Smooth sweet potatoes make all the difference in achieving that creamy texture. If you’re short on time, a food processor can also do the trick.
Balance sweetness: Sweet potato casserole is naturally sweet, but make sure to taste the mixture before adding the eggs to adjust the sweetness to your liking.
Get the perfect marshmallow topping: Spread them evenly and monitor closely as they toast. A few seconds too long, and they can burn quickly!
Make ahead: Prepare the sweet potato mixture a day in advance, refrigerate, and add marshmallows just before baking to save time.

Don’t stress if your sweet potatoes seem a little watery after boiling — that’s why we mash them first. Also, if you’re looking for a slightly less sweet version, reduce the brown sugar to 1/3 cup.

Variations & Adaptations

Gluten-free option: This recipe is naturally gluten-free, but double-check your marshmallow brand to ensure there are no hidden gluten-containing ingredients.
Dairy-free alternative: Swap butter for a plant-based option and use coconut cream or almond milk instead of heavy cream.
Add some crunch: Mix crushed pecans with brown sugar and sprinkle over the marshmallows before baking for an added layer of texture.
Spice it up: For a slightly different flavor profile, try adding a pinch of ground ginger or cardamom.
Skip the marshmallows and brown sugar, add a touch of smoked paprika, and top with breadcrumbs and Parmesan cheese for a savory twist.

When I wanted to cut back on sugar, I once replaced the marshmallows with a blend of chopped pecans and coconut flakes—it was a hit! Feel free to get creative with this recipe and make it your own.

Serving & Storage Suggestions

This creamy sweet potato casserole is best served warm, straight from the oven. The marshmallows are gooey and delicious, and the sweet potato filling is wonderfully creamy.

For presentation, serve it in the baking dish or transfer portions onto plates. Pair it with roasted turkey, ham, or a fresh green salad for a complete meal. A glass of spiced apple cider or a warm cup of coffee complements this dish perfectly!

If you have leftovers, store the casserole in an airtight container in the refrigerator for up to 3 days. To reheat, simply pop it in the microwave or warm it in a low oven until heated through. You can also freeze the sweet potato mixture (without marshmallows) for up to 2 months—just thaw, add marshmallows, and bake when ready.

Nutritional Information & Benefits

Here’s the approximate nutritional breakdown per serving:

Calories: 250
Protein: 3g
Carbohydrates: 45g
Fat: 8g
Fiber: 4g

Sweet potatoes are packed with vitamins A and C, dietary fiber, and antioxidants, making them a nutritious choice. Plus, they’re naturally sweet and filling, making this dish a healthier comfort food option. If you’re following a specific diet, remember to adjust ingredients like butter or sugar to suit your needs.

Conclusion

Whether you’re hosting a holiday feast or just craving something cozy and delicious, this creamy sweet potato casserole with toasted marshmallows is a must-try. The combination of flavors and textures is simply irresistible, and it’s incredibly easy to customize for your taste or dietary needs.

This recipe holds a special place in my heart because it brings back warm memories of family gatherings and the joy of sharing comforting food with loved ones. Plus, the way those marshmallows melt and get golden? It’s pure magic every time.

If you give this recipe a try, I’d love to hear how it turns out! Leave a comment below, share your photos, or let me know if you tried any fun variations. Happy cooking, and may your table be filled with love and laughter!

FAQs

Can I make this recipe ahead of time?

Yes! You can prepare the sweet potato mixture a day ahead and refrigerate it. Add the marshmallows just before baking for the freshest topping.

Can I use canned sweet potatoes?

Absolutely! If you’re short on time, canned sweet potatoes work well. Just make sure to drain them thoroughly before mashing.

What’s the best way to toast the marshmallows?

If your oven has a broil setting, turn it on for the last minute or two of baking to get that perfectly golden, toasted look. Watch closely to prevent burning!

Can I add nuts to this recipe?

Yes, toasted pecans make a wonderful addition to this casserole. You can sprinkle them over the marshmallows or mix them into the sweet potato base.

How do I make this dish less sweet?

Reduce the amount of brown sugar to 1/4 cup or skip the marshmallows altogether. You can add a savory topping like breadcrumbs and Parmesan for a different twist.

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