In a large bowl, using an electric mixer, combine mashed sweet potatoes, sugar, salt, butter, eggs and vanilla, mix thoroughly. Spread sweet potato mixture in a buttered 9 x 13 glass baking dish.
In medium bowl, mix together topping with a pastry blender or fork. Sprinkle on top of casserole. Bake for 30 minutes or until golden brown. Enjoy!!
Cook's Note: To make baked sweet potatoes, bake them in their own jackets (do not peel). Wash each potato and cut off the ends. Place on a greased, foil lined baking sheet. Preheat oven to 400 degrees, bake for 40 to 60 minutes (depending on the size of the potatoes) or until soft when poked with a fork. Let potatoes cool, peel and mash for casserole above.