This recipe is from Southern Living.
You can find the original recipe here.
Classic Sweet Potato Casserole
4 1/2 pounds sweet potatoes
1 cup granulated sugar
1/2 cup butter, softened
1/4 cup milk
2 large eggs
1 teaspoon vanilla extract
1/4 teaspoon salt
1 1/4 cups cornflakes cereal, crushed
1/4 cup chopped pecans
1 tablespoon brown sugar
1 tablespoon butter, melted
1 1/2 cups miniature marshmallows
Preheat oven to 400°. Bake sweet potatoes at 400° for 1 hour or until tender. Let stand until cool to touch (about 20 minutes); peel and mash sweet potatoes.
Reduce oven temperature to 350°.
Beat mashed sweet potatoes, granulated sugar, and next 5 ingredients at medium speed with an electric mixer until smooth.
Spoon potato mixture into a greased 11- x 7-inch baking dish.
Combine cornflakes cereal and next 3 ingredients in a small bowl.
Sprinkle over casserole in diagonal rows 2 inches apart.
Bake at 350° for 30 minutes. Remove from oven; let stand 10 minutes. Sprinkle marshmallows in alternate rows between cornflake mixture; bake 10 minutes.
Let stand 10 minutes before serving.