Boil and cut skins off of the sweet potatoes,then cut up into mixing bowl. Add eggs,sugar and vanilla into the bowl and mix. Gradually add the milks into the mix along with the spices until all ingredients are mixed thoroughly.
In a baking pan add flour , butter, dash of cinnamon and pecans, mix together. Flatten mixture across pan until the bottom of the pan is covered. Bake of 350 in preheated stove for 20 mins.
After crust is finish add sweet potato mixture on top of the crust and bake for 45mins.
When finished baking add marshmallow whipped topping immediately after taking casserole out of the stove.(Easier to spread!) Then sprinkle pecans on the top and serve.