Toasted Marshmallow Twice Baked Sweet Potatoes
Toasted Marshmallow Twice Baked Sweet Potatoes are creamy, slightly sweet, and topped with golden toasted mini marshmallows for a nostalgic finish. This easy to assemble side brings warm spices like cinnamon and nutmeg and a glossy maple sweetness, making it an ideal easy weeknight dinner side or holiday showpiece. Make it for gatherings to impress without fuss.
Equipment
- Baking Sheet
- Foil
- Large Bowl
- Whisk
- Knife
Ingredients
- 4 medium-sized sweet potatoes, washed well and dried Wash and dry thoroughly to ensure clean skins for roasting; cooks evenly and provides a naturally sweet, creamy base for the twice-baked preparation.
- 1 tablespoon melted coconut oil OR canola oil Melt to brush or toss with potato flesh before roasting; adds a light layer of fat that promotes browning and a subtle, neutral flavor.
- 3 tablespoons unsalted butter, very soft Soften and whip into the baked sweet potato flesh to add richness and a smooth, creamy texture that balances sweetness.
- 2 and 1/2 tablespoons maple syrup Drizzle into the mashed sweet potato mixture to enhance natural sweetness and add depth with its characteristic maple flavor.
- 1 teaspoon vanilla extract Add to the filling to provide a warm, rounded aromatic note that enhances the overall sweetness and complements the marshmallows.
- 1/2 teaspoon ground cinnamon Sprinkle into the flesh to introduce warm spice and subtle warmth that pairs well with sweet potatoes and marshmallow topping.
- 1/4 teaspoon freshly grated nutmeg Grate fresh for a bright, slightly sweet and nutty background flavor that elevates the dish with aromatic complexity.
- 1/8 teaspoons salt Pinch into the filling to subtly enhance and balance flavors; brings out natural sweetness and rounds savory notes.
- 2 cups mini marshmallows Scatter over the filled potatoes before broiling to melt into a gooey, caramelized topping that delivers classic toasted marshmallow appeal.
Instructions
- Preheat oven to 400 degrees (F). Line a baking sheet with foil. Rub the sweet potatoes with oil, prick them in a few places with a fork, then place them on the prepared baking sheet and roast for 1 hour, or until tender. Cool for 10 minutes.: The kitchen fills with a warm, slightly sweet scent as the oven comes to temperature, and a reliably hot oven ensures the sweet potatoes roast through evenly. A well heated oven promotes Maillard browning on the skins, which adds depth of flavor. A common mistake is starting with an under heated oven, which can lead to uneven cooking, so be sure it is fully preheated before the potatoes go in.
- Carefully slice each sweet potato in half lengthwise and gently scrape 3/4's of the flesh into a large bowl. Add in the softened butter, maple syrup, vanilla, cinnamon, nutmeg, and salt; whisk well to combine.: The foil catches drips and makes cleanup quick, and it also reflects heat to help the bottoms of the potatoes develop color. You will hear a faint sizzle as the oiled skins touch the hot sheet, a small cue that roasting is progressing. Avoid overcrowding the pan, which can cause steaming rather than roasting.
- Divide the sweet potato filling evenly among the 8 skins. Cover the top of each sweet potato with mini marshmallows, pressing them into the filling so they stay in place as they bake. Bake for 15 minutes, then turn the broiler on and broil for 1 minute, or until the mini marshmallows are toasted. Stay close during this step as the marshmallows can go from toasted to burnt VERY quickly. Serve warm.: Rubbing the skins with the melted oil gives them a glossy finish and helps them crisp in the oven. You should feel the skins become slightly tacky to the touch, which indicates the oil has adhered. Skipping this step can leave skins dull and less robust for holding the filling.
- Prick them in a few places with a fork: Those little perforations allow steam to escape while roasting, preventing the potatoes from bursting and helping them cook uniformly. Listen for subtle softening when you press the potatoes after roasting; that tenderness tells you they are done. Neglecting to prick can result in uneven texture or burst skins.
- Place them on the prepared baking sheet and roast for 1 hour, or until tender: As the potatoes roast, their aroma becomes sweet and earthy, and the skins darken with tiny blisters. Test for doneness by inserting a fork into the center, it should meet little resistance and the flesh should feel soft. If you remove them too soon, the inside will be dense rather than fluffy, so allow the full hour or until tender.
- Cool for 10 minutes: Letting the potatoes rest makes them easier to handle and allows steam to settle so the filling is not watery. You will notice the aroma deepening as they cool, and the flesh firms slightly for scooping. Rushing this rest can result in a runnier filling that is harder to shape.
- Carefully slice each sweet potato in half lengthwise: Slicing reveals the steamy interior and creates skins ready to be filled, and the clean cut gives you even halves. Use a sharp knife so the cut is smooth and you avoid tearing the skins. A dull blade can crush the potato and make scooping messy.
- Gently scrape 3/4's of the flesh into a large bowl: The scraped flesh should be warm, yielding, and slightly stringy, yet soft enough to mash. Leaving some flesh attached to the skins maintains structure so they remain sturdy vessels. Over scraping can thin the skins and make them fragile.
- Add in the softened butter, maple syrup, vanilla, cinnamon, nutmeg, and salt: As you whisk, the mixture will become glossy and fragrant, with the sweet aroma of maple and warm spice notes. The butter melts into the warm flesh, creating a creamy base that holds the marshmallows. A typical issue is not softening the butter enough, which leaves small chunks and prevents a smooth texture.
- Whisk well to combine: The filling should become homogeneous and silky, with no large lumps, and you should notice the scent of vanilla brightening the mash. Whisking aerates the filling slightly, making it lighter in the final presentation. Under mixing will leave pockets of uneven seasoning.
- Divide the sweet potato filling evenly among the 8 skins: Piping or spooning the mixture back into the skins creates a tidy presentation, and you can smooth the tops so the marshmallows sit evenly. Even distribution ensures consistent serving sizes and predictable baking times. A common misstep is overfilling, which can cause spillage during the final bake.
- Cover the top of each sweet potato with mini marshmallows, pressing them into the filling so they stay in place as they bake: The marshmallows should nestle into the filling and create a dense, even layer that will puff and brown under heat. Gently pressing them helps them adhere and prevents sliding during the bake. Skipping this can leave exposed filling that browns differently than the marshmallow topping.
- Bake for 15 minutes: During this stage the marshmallows will begin to melt and the filling will heat through so everything is cohesive, and you will hear soft bubbling at the edges where sugars concentrate. This gentle bake readies the surface for the short, intense broil that follows. Baking too long here can over soften the marshmallows before broiling.
- Turn the broiler on and broil for 1 minute, or until the mini marshmallows are toasted: Under the broiler the marshmallows transform rapidly, puffing and developing golden patches that deepen into rich caramelized notes, and the tops should take on a warm toasted color. Stay close during this step as the marshmallows can go from toasted to burnt VERY quickly, and you will want to pull them the moment you see even golden spots. Using the broiler too long will char them.
- Serve warm: These are best enjoyed right away while the marshmallows are soft and the filling steamy, offering a comforting medley of textures and flavors that melt together on the palate. The contrast of warm filling and sticky, slightly crisp marshmallows is most pronounced when served immediately. If left too long, the marshmallows will cool and become chewier rather than luscious.
Notes
- Double the recipe when serving a crowd — If you are cooking for many, simply double the ingredient amounts and roast the potatoes on two sheets. Make sure they have space so they roast rather than steam, and rotate pans if your oven has hot spots.
- Control sweetness with maple syrup — If you prefer less sweetness, reduce the maple syrup slightly and taste the filling before stuffing the skins. This keeps the marshmallow top as the main sweet note without overwhelming the natural sweet potato flavor.
- Soften butter fully for a smooth filling — Room temperature unsalted butter blends into the warm potato faster, creating a silkier texture. If the butter is too cold it will create lumps that take longer to smooth out.
- Test potato tenderness with a fork — Insert a fork to check that the sweet potatoes are tender all the way through before scooping; undercooked centers will lead to a dense filling. If a fork meets resistance, roast a bit longer.
- Work quickly before broiling — Once the marshmallows go in, the timeline speeds up, so have the oven rack in position and the broiler ready. This prevents delays that can cool the dish and affect final texture.