Sweet Potato Casserole with Marshmallows
AI-generated image
Vegetarian Gluten-free American

Sweet Potato Casserole with Marshmallows

A warmly spiced American sweet potato casserole with a silky brown-butter mash and a toasted marshmallow crown. It balances earthy sweetness with orange zest, vanilla, and a crisp, lightly caramelized top.

70 min 6 servings Medium
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How to prepare

1
Heat the oven to 200°C. Arrange the pierced sweet potatoes on a baking sheet and roast for 45 to 60 minutes, until a knife slides through the centers without resistance.
2
When the sweet potatoes are cool enough to handle, split them lengthwise, scoop the flesh into a bowl, and discard the skins. Mash until nearly smooth, leaving only a few small rustic pieces.
Roasted sweet potato flesh being scooped from its skins AI-generated image
3
Melt 45 g of the butter in a small saucepan over medium heat. Cook for 3 to 4 minutes, swirling occasionally, until the milk solids turn amber and smell nutty; remove from the heat immediately.
4
Add the brown butter, warm cream, brown sugar, orange zest, 2 tablespoons orange juice, vanilla, cinnamon, and 3/4 teaspoon salt to the sweet potatoes. Mix until glossy and evenly seasoned, then taste and adjust the salt if needed.
5
Reduce the oven to 180°C. Grease a 2-liter baking dish with the remaining 15 g butter, transfer in the sweet potato mixture, and smooth the surface. Bake for 20 minutes, until the edges are gently bubbling and the center is hot.
6
Scatter the marshmallows evenly over the hot casserole. Bake for 5 to 8 minutes more, until puffed and golden brown; if needed, broil for 30 to 60 seconds while watching continuously. Rest for 5 minutes, then serve warm.
Toasted marshmallows on top of sweet potato casserole AI-generated image

Why this recipe works

Roasting concentrates the sweet potatoes before they are enriched with brown butter, cream, citrus, and spice. Baking the marshmallows separately at the end preserves a soft center and gives the casserole its signature toasted finish.

Storage and reheating

How to store it

Cool leftovers within two hours, cover tightly, and refrigerate for up to 4 days. If making ahead, prepare the sweet potato base, cover, and refrigerate for up to 24 hours; add marshmallows just before baking.

How to reheat it

Reheat covered at 175°C until hot throughout, about 20 minutes for a refrigerated casserole, then uncover and add marshmallows. Toast the topping under the broiler for 1 to 2 minutes if needed.

Nutrition / serving

479kcal
5.32 gprotein
82.36 gcarbs
15.64 gfat
P
Pantryvale editorial kitchen
Recipe prepared for publication with complete ingredients and ordered cooking steps.
Published 14 Aug 2026 · updated 14 Aug 2026

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