01 -
Preheat oven to 350°F (175°C). Coat a 9×13-inch baking dish with nonstick cooking spray.
02 -
Place sweet potatoes in a large pot, cover with water, and bring to a boil. Cook until fork-tender, about 15 to 20 minutes.
03 -
Drain sweet potatoes thoroughly and allow to cool slightly. Transfer to a mixing bowl and mash until smooth.
04 -
Add melted butter, maple syrup, brown sugar, ground cinnamon, ground nutmeg, and a pinch of salt to the mashed sweet potatoes. Stir until mixture is uniformly combined.
05 -
Spread sweet potato mixture into the prepared baking dish, smoothing the top evenly.
06 -
Sprinkle chopped pecans over the surface. Top with mini marshmallows if desired.
07 -
Bake for 25 to 30 minutes, until heated through and the surface turns golden brown.