Preheat oven to 375 degrees and spray a 9x13 baking dish with non-stick spray. Set aside.
In a large pot of water, boil cubed potatoes for 15 mins or until tender. Drain and let cool slightly.
To a large bowl, add the cooked potatoes, sugar, butter, salt, and vanilla.
Mash with a potato masher until desired consistency.
Spread the mashed potatoes evenly into the prepared baking dish.
Sprinkle mini marshmallows evenly over the top.
Bake for 25 minutes or until golden. Serve & enjoy!
I usually boil the potatoes but you can roast, bake, or pressure cook them.Mash the potatoes to your desired consistency - leave them chunky or mash them smooth.Some marshmallows will melt, but keep an eye on them so they get your desired level of toastiness. Optional: add 1/2 cup chopped pecans - 1/4 cup stirred into the potatoes & 1/4 cup sprinkled on top with the marshmallows.