Boil 6 medium sized sweet potatoes, until the skin is soft enough to peel off.
Slice & peel the skin off the sweet potatoes and place into a large bowl.
Mash the potatoes & begin to add the following ingredients: melted butter, vanilla, salt, evaporated milk, eggs, cinnamon & pumpkin spice mix.
Use a hand mixer to combine the ingredients.
Butter your baking dish & add the mixture evenly.
Topping: In a medium sized bowl, combine the following ingredients: brown sugar, flour, butter, pecans.
Spread the topping evenly over the sweet potato mixture.
Spread the marshmallows evenly over the sweet potato mixture.
Cook in the oven at 350 degrees for 35 minutes, or until browned.