Per serving
I grew up eating sweet potatoes cooked this way. Granny knew it was my favorite and she always served them when I was visiting her. I leave out the nutmeg (personal preference).
optional
optional, to taste
Place potatoes and salt in a large pot.
Add water to cover; bring to a boil; boil for 30 minutes or until potatoes are tender; drain.
Let potatoes cool until you can handle them; peel and cut into chunks.
Place potatoes, butter, half-and-half, cinnamon, nutmeg (if using), vanilla, and sugar in a large bowl.
Beat using an electric mixer on medium speed until smooth.
Spoon potato mixture into a lightly greased 13x9 inch baking dish.
Bake at 350° for 30 minutes.
Top with marshmallows; bake 15 more minutes or until golden.
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