In a large bowl, combine the sweet potatoes, sugar, butter, milk, vanilla and salt; beat until smooth. Spoon into a greased 2-1/2-qt. baking dish. Combine the topping ingredients; sprinkle over potato mixture.
Bake, uncovered, at 350° for 40-45 minutes or until heated through and topping is browned.
Test Kitchen tip The potato mixture can be prepared ahead of time and refrigerated. Remove from the refrigerator 20 minutes before baking, then sprinkle with the topping just before putting it into the oven.