When the holidays roll around, there’s one dish that always gets requested; Sweet Potato Souffle Casserole. It’s nostalgic, comforting, and somehow the first to disappear at the table. The recipe was born out of one of those “clean-out-the-fridge” nights when I had leftover baked sweet potatoes and a few marshmallows hiding in the back of the pantry. My husband took one bite and said, “This has to go on the Thanksgiving menu.” Since then, it’s been a staple, whether we’re feeding just the two of us or a full house.

In this article, we’ll walk through why you’ll love this dish, exactly how to make it, plus helpful tips and a few creative variations. Whether you call it a Sweet Potato Casserole or a Potato Souffle Casserole, this one’s bound to earn rave reviews.

Table of Contents

Why You’ll Love This Recipe

Sweet, creamy, and utterly nostalgic. This dish strikes the perfect balance between dessert and side dish. It’s packed with warm spices, buttery richness, and that irresistible fluffy marshmallow topping that caramelizes beautifully in the oven.

Another reason to love it? It’s easy. You can prep it ahead and bake just before serving. It’s also flexible, whether you like a pecan topping, a marshmallow blanket, or both, this casserole adapts.

Not only is it holiday-friendly, but it’s also a crowd-pleaser year-round. Pair it with roasted mains or make it the star of a cozy weeknight dinner. If you’re into comforting classics like Honey Feta Sweet Potato Rounds, you’ll find this soufflé-style bake just as memorable.

Ingredients You’ll Need

Making a perfect sweet potato souffle casserole starts with simple, wholesome ingredients you likely already have:

Sweet Potatoes – Roasted or boiled until tender, then mashed smooth.
Eggs – Help create that signature light and fluffy texture.
Butter – For richness.
Milk or Cream – Adds creaminess (evaporated milk also works well).
Brown Sugar – Adds a deep caramel-like sweetness.
Cinnamon + Nutmeg – Classic warm spices.
Vanilla Extract – Enhances flavor.
Salt – Balances the sweetness.
Mini Marshmallows or Pecan Topping – Toasty and delicious.

Feel free to customize, if you love a nutty crunch, use a buttery pecan streusel like the one on our Cranberry Apple Twice-Baked Sweet Potatoes. Prefer it creamy and pillowy? Stick to the marshmallows.

How to Make Sweet Potato Souffle Casserole

1. Prep your sweet potatoes.
You can either boil peeled sweet potatoes or roast them whole at 400°F for about 45 minutes until soft. Roasting brings out a deeper flavor.
2. Mash and mix.
In a large bowl, mash the sweet potatoes. Stir in butter, eggs, milk, sugar, vanilla, salt, and spices. Mix until smooth and creamy.
3. Transfer and top.
Pour the sweet potato mixture into a greased casserole dish. Top with mini marshmallows or pecan crumble, depending on your preference.
4. Bake.
Bake uncovered at 350°F for 25–30 minutes, or until golden and bubbly.

If you’re looking for more comforting bakes, check out this Baked Cream Cheese Spaghetti Casserole that’s just as family-friendly and rich.

Tips and Variations

Make it ahead.
Prepare everything except the topping a day ahead and refrigerate. Add the topping just before baking.
Toppings, your way.
Go for marshmallows for a dessert-like finish, or opt for a crunchy pecan topping made with brown sugar, butter, and a bit of flour. Or be bold, use both.
Make it dairy-free.
Substitute dairy milk with almond or oat milk and use vegan butter. There are even dairy-free marshmallows available now.
Switch the spice.
Cinnamon and nutmeg are classic, but don’t hesitate to add ginger or allspice for a twist. It gives the same cozy vibe as in this Maple Sweet Potato Casserole, which uses maple syrup for a deeper sweetness.

Frequently Asked Questions

Can I use canned sweet potatoes?
Yes, just drain them well and mash before mixing. Adjust sugar based on sweetness.

What’s the difference between sweet potato souffle and casserole?
Soufflé tends to be lighter and includes eggs for that whipped texture, while casseroles can be denser. This recipe meets right in the middle.

Can I freeze this casserole?
Yes. Make it without the topping and freeze. When ready to serve, thaw overnight, add topping, and bake fresh.

How do I avoid a runny texture?
Ensure the potatoes are well-drained and not overboiled. Stick to the measurements and don’t overmix the eggs.

Conclusion: A New Favorite for Your Table

This Sweet Potato Souffle Casserole is a warm hug in a dish; creamy, sweet, and finished with the perfect golden top. Whether you call it a Sweet Potato Casserole or a Potato Souffle Casserole, it deserves a spot on your table. It’s simple enough for weeknights and special enough for holidays.

If you enjoy hearty classics like Ground Beef and Potato Casserole, this sweet version adds the perfect contrast to your savory lineup. Give it a try this season, you might just start a new tradition.

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Sweet Potato Souffle Casserole

Why You’ll Love This Recipe