Sweet potato casserole

Steps

1. Preheat the oven to 350 degrees
2. Poke the sweet potatoes all over with a fork, place on baking sheet lined with aluminum foil. Bake in oven until soft, about 1 hour. Let cool for about 30 minutes.
3. Peel sweet potatoes with a knife, discard the skin. Add to bowl and mash with potato masher or strong fork.
4. Add the 1/2 cup butter, eggs, condensed milk, granulated sugar, vanilla extract and salt to the bowl. Mix with a hand mixer on medium speed until well combined.
5. Make the topping: In a medium bowl, stir together pecans, cornflakes, brown sugar, flour and butter until well combined.
6. Grease a 9x13 casserole or glass dish with butter. Pour the sweet potato mix evenly in pan. Carefully top mix with topping, lightly smoothing over with spoon.
7. Bake until slightly browned, about 35 mins.
8. Remove from oven and add marshmallows in an even layer.
9. Return to the oven for another 5 minutes, until marshmallows are slightly toasted.