Sweet Potato Casserole with Marshmallows
Creamy Sweet Potato Casserole with Marshmallows and pecans is the ultimate Thanksgiving side dish. Ready in 45 minutes with golden, toasty perfection!
You know that moment at Thanksgiving when everyone goes quiet and just reaches for seconds? That’s the power of a really good sweet potato casserole. I’ve been making this one for years, and honestly, it’s the dish that disappears first at every holiday gathering.
There’s something about that caramelized marshmallow topping and the buttery, cinnamon-kissed sweet potatoes underneath that just feels like a warm hug from your favorite aunt.
Little Snapshot: What This Recipe Delivers
This Sweet Potato Casserole with Marshmallows combines creamy mashed sweet potatoes with brown sugar, butter, and warm cinnamon, then gets topped with gooey marshmallows and crunchy pecans. It’s the classic holiday side dish that tastes like dessert but totally belongs on your dinner table — ready in just 45 minutes with minimal fuss.
Why You’ll Love This Recipe 🌸
- This Sweet Potato Casserole comes together faster than finding matching Tupperware lids — seriously, 45 minutes from start to finish.
- It’s the perfect balance of savory and sweet, so it works as either a side dish or sneaky dessert (no judgment here).
- The marshmallow topping gets all golden and toasty while the pecans add that satisfying crunch everyone loves.
- According to Southern Living, sweet potato casserole became a Thanksgiving staple in the 1900s — and this recipe shows exactly why it’s stood the test of time.
Quick Facts ⚡
Here’s the quick scoop on this Sweet Potato Casserole with Marshmallows.
- CourseSide Dish
- Prep Time20 minutes
- Cook Time25 minutes
- Total Time45 minutes
- Servings16 servings
- DifficultyEasy
Table of Contents
Nutritional Peek
Look, we’re not pretending this is a kale salad, but it’s actually got some good stuff going on. Sweet potatoes are packed with vitamins, and hey, there’s fiber in there too. Here’s what you’re working with per serving:
| Nutrient | Amount per Serving |
|---|---|
| Calories | 185 kcal |
| Protein | 2g |
| Carbohydrates | 28g |
| Total Fat | 8g |
| Saturated Fat | 3g |
| Fiber | 3g |
| Sugar | 16g |
| Sodium | 75mg |
Ingredients
The Best Sweet Potato Casserole with Marshmallow Recipe starts with ingredients you probably already have hanging around your kitchen. No fancy stuff, no weird substitutions — just the good, simple things that make holidays taste like home.
| Amount | Ingredient |
|---|---|
| 3 pounds | sweet potatoes, peeled and cut into cubes |
| ½ cup | brown sugar, packed (yes, the real stuff — it matters) |
| ⅓ cup | butter, softened (margarine just doesn’t cut it here) |
| ½ teaspoon | vanilla extract |
| ¾ cup | chopped pecans, divided |
| ¼ teaspoon | cinnamon (or more if you’re feeling it) |
| to taste | salt and black pepper |
| 2 cups | miniature marshmallows (the mini ones melt better, trust me) |
Tools You’ll Actually Use
You don’t need a fancy kitchen to nail this one. Here’s what you’ll want on hand:
- Large pot for boiling
- 9×13-inch baking pan
- Potato masher or hand mixer
- Large mixing bowl
- Vegetable peeler
- Sharp knife and cutting board
- Measuring cups and spoons
How to Make the Sweet Potato Casserole with Marshmallows
Making this Sweet Potato Casserole with Marshmallows is honestly easier than parallel parking. Let’s walk through it together.
Step 1: Get Your Oven Ready Preheat your oven to 375°F and give that 9×13 pan a good greasing. I like using butter for this because everything tastes better with butter, but cooking spray works too if you’re in a hurry.
Step 2: Cook Those Sweet Potatoes Toss your cubed sweet potatoes into a big pot of boiling water. Let them simmer for about 15 minutes — you’ll know they’re ready when a fork slides through them like they’re made of clouds. Drain them well.
Step 3: Get Mashing Here’s where the magic happens. In a large bowl (or honestly, just use the pot you cooked them in to save on dishes), mash those sweet potatoes with the brown sugar, butter, cinnamon, vanilla, salt, and pepper. Don’t stress about getting every single lump out — a little texture is actually nice.
Step 4: Add the Crunch Fold in half of those chopped pecans and spread the whole mixture into your prepared pan. Make sure it’s pretty even so everything bakes at the same rate.
Step 5: Marshmallow Time Sprinkle the marshmallows all over the top, then add the remaining pecans. This is the moment where it starts looking like a real holiday dish.
Step 6: Bake Until Golden Pop that beauty in the oven for 25 minutes. You’re looking for golden-brown marshmallows and heated-through potatoes. Your kitchen’s gonna smell like Thanksgiving threw a party with a bakery.
Claire’s Pro Tips & Gentle Guidance
This Easy Sweet Potato Casserole is pretty forgiving, but here are some things I’ve learned the hard way so you don’t have to:
- Don’t skip draining the potatoes really well. Extra water makes your casserole soupy, and nobody wants that. I learned this one the hard way at my first Friendsgiving.
- Room temperature butter is your friend. It mashes into the potatoes way easier and creates this silky texture that cold butter just can’t pull off.
- Watch those marshmallows like a hawk in the last 5 minutes. They go from perfect to charcoal real quick. If they’re browning too fast, just tent some foil over the top.
- Make it ahead! You can prep this entire thing the day before, keep it covered in the fridge (without the marshmallow topping), and just add the marshmallows and pecans before baking. The folks at Food Network are big on make-ahead dishes for good reason — it saves your sanity on the big day.
Quick Fixes for Sweet Potato Casserole with Marshmallows
Even the easiest recipes can throw curveballs sometimes. Here’s how to handle the common ones:
Too Watery? Your potatoes probably weren’t drained enough. Fix it by cooking the mixture on the stovetop for a few minutes to evaporate excess moisture before adding to the pan.
Marshmallows Burning Before Casserole Heats Through? Cover with foil and lower the temp to 350°F. Give it an extra 10 minutes to warm through properly.
Too Sweet? Add a pinch more salt and a tiny dash of black pepper. It sounds weird, but savory flavors balance out sweetness beautifully.
Sweet Potatoes Still Lumpy? Use a hand mixer to smooth them out. Some people like a rustic texture, but if you’re team smooth, blend away.
Variations & Fun Twists
One of the best things about this Sweet Potato Casserole is how easy it is to make it your own:
Go Savory: Skip the marshmallows entirely and top with more pecans, a drizzle of maple syrup, and some crispy bacon crumbles. Game changer.
Make It Fancy: Add a streusel topping instead of marshmallows — mix flour, brown sugar, butter, and pecans for a crumbly, crunchy lid.
Holiday Spice It Up: Add a pinch of nutmeg and ginger along with the cinnamon for more of that cozy spice vibe.
Individual Portions: Divide the mixture into ramekins for cute single-serve casseroles. Perfect for a dinner party where you want everyone to feel special.
Lighter Version: Use half the butter and swap brown sugar for maple syrup. Still delicious, slightly less guilt.
Serving, Storage & Reheating
Your Easy Sweet Potato Casserole is best served warm, straight from the oven when those marshmallows are still all melty and perfect. Pair it with classics like creamy mashed potatoes, Grandma’s stuffing, and easy cranberry sauce for the ultimate Thanksgiving spread.
Storage: If you actually have leftovers (which I doubt), cover the pan tightly with foil and keep it in the fridge for up to 4 days.
Reheating: Pop it in a 350°F oven for about 15-20 minutes until warmed through. The marshmallows might lose some of their toasty magic, but honestly, it’s still delicious.
Microwave works in a pinch too — just do it in 30-second bursts so you don’t end up with a lava situation.
Freezing: You can totally freeze this! Assemble the whole thing without the marshmallow topping, wrap it really well, and freeze for up to 3 months. Thaw overnight in the fridge, add your marshmallows and pecans, and bake as directed.
No-Waste Kitchen Magic
Let’s talk about getting the most out of this recipe because I hate throwing food away almost as much as I hate doing dishes.
Leftover Sweet Potatoes: Got some cooked sweet potatoes hanging around? Blend them into smoothies, mash them into pancakes, or stir them into oatmeal. They freeze beautifully too.
Sweet Potato Skins: Don’t toss those peels! Toss them with olive oil and spices, roast them until crispy, and boom — you’ve got chips.
Extra Marshmallows: Obviously perfect for hot chocolate, but also great melted and drizzled over creamed corn or frozen bananas for a sweet treat.
Day-Old Casserole: Chop it up and use it as a filling for hand pies or empanadas. Sounds weird, tastes amazing.
Sweet Potato Casserole with Marshmallows FAQs
When to put marshmallows on sweet potato casserole?
Add the marshmallows right before baking — not while you’re cooking the sweet potatoes. They need that direct oven heat to get all golden and toasty on top while staying gooey underneath. If you add them too early, they’ll just melt into nothing.
Why do they put marshmallows on sweet potatoes?
Honestly, it’s a delicious Southern tradition that started in the early 1900s when marshmallow companies were looking for new ways to use their product. Turns out, the combo of savory sweet potatoes and sweet marshmallows is basically magic. Plus, it makes the dish feel extra special and holiday-worthy.
Is it better to boil or bake sweet potatoes for casserole?
I’m team boil for this recipe because it’s faster and gives you more control over the texture. Boiled sweet potatoes mash super smoothly and soak up all that butter and brown sugar like a dream. Baking works too, but it takes longer and can make them a bit drier.
What goes in sweet potato casserole?
The classics are sweet potatoes (obviously), butter, brown sugar, cinnamon, vanilla, and marshmallows on top. Pecans add a nice crunch, and some people throw in a splash of milk or cream. You can keep it simple or get fancy with it — there’s no wrong answer.
Cozy Closing
There you have it — a Sweet Potato Casserole with Marshmallows that’ll make you the MVP of any holiday gathering. Whether you’re making it for Thanksgiving, a potluck, or just because Tuesday needs more marshmallows, this recipe’s got your back.
I’d love to see your spin on this Sweet Potato Casserole! Leave a note below or tag me on Instagram so we can share a sweet moment together. And if you’re building out your holiday menu, don’t miss the cranberry turkey stuffing balls or that garlic parmesan chicken — they pair beautifully with this dish.
I’m Claire Whitmore — a dessert daydreamer from Asheville, NC. For me, baking isn’t about perfect pastries — it’s about the joy of sharing something sweet (and maybe sneaking an extra scoop of icing).
Sweet Potato Casserole with Marshmallows
Equipment
- Large pot
- 9×13 inch baking pan
- Potato masher or hand mixer
- Large mixing bowl
- Vegetable peeler
- Sharp knife
- Cutting board
- Measuring cups and spoons
Ingredients
Main
- 3 pounds sweet potatoes peeled and cut into cubes
- ½ cup brown sugar packed
- ⅓ cup butter softened
- ½ teaspoon vanilla extract
- ¾ cup chopped pecans divided
- ¼ teaspoon cinnamon
- to taste salt and black pepper
- 2 cups miniature marshmallows
Instructions
- Preheat oven to 375°F and grease a 9×13-inch baking pan.
- Boil cubed sweet potatoes in a large pot for about 15 minutes, until tender. Drain well.
- Mash sweet potatoes with brown sugar, butter, cinnamon, vanilla, salt, and pepper until smooth and creamy.
- Fold in half of the chopped pecans and spread the mixture evenly into the greased pan.
- Top with miniature marshmallows and remaining pecans.
- Bake for 25 minutes, until marshmallows are golden brown and casserole is heated through.
