Ingredients
Method
Prep and Roast Sweet Potatoes
- Preheat oven to 375°F (190°C). Pierce clean sweet potatoes all over with a fork and roast on a foil-lined baking sheet for 45 to 55 minutes until fork-tender. Allow them to cool slightly, then peel off the skins.
- Grease a 9x13-inch (or 2.5 to 3-quart) ceramic baking dish with butter. Set oven temperature down to 350°F (175°C).
Whip the Sweet Potato Filling
- Transfer the warm sweet potato flesh into a large mixing bowl. Mash with a potato masher or hand mixer until completely smooth.
- Add melted butter, packed brown sugar, heavy cream, beaten eggs, pure vanilla extract, cinnamon, nutmeg, and sea salt. Beat on medium speed for 1 to 2 minutes until light, fluffy, and lump-free. Spread the mixture evenly into the prepared baking dish.
Assemble Pecan Streusel & Bake
- In a medium bowl, whisk together chopped pecans, brown sugar, all-purpose flour, and cinnamon. Pour in the melted butter and stir with a fork until moist, crumbly clusters form.
- Evenly scatter the pecan streusel over the whipped sweet potato filling. If adding mini marshmallows, scatter them alongside or over the pecans during the final 8 minutes of baking to prevent burning.
- Bake at 350°F (175°C) uncovered for 30 to 35 minutes until the casserole is bubbly around the edges, the pecan topping is fragrant and caramelized, and marshmallows turn puffed and golden. Rest 10 minutes before serving.
