Bake sweet potatoes @ 350 for 1 hour; leave oven @ 350 degrees to bake casserole

In a large mixing bowl peel and mash potatoes

To potato mixture add sugar, milk, butter, eggs beaten, vanilla and mix together with mixer

Pour mixture into cake pan

For topping in a medium mixing bowl mix flour, brown sugar, butter and pecans and stir well; add butter if mixture is to crumbly

Pour pecan mixture over potatoes and bake for 30 minutes @ 350 degrees