3 cups cold mashed sweet potatoes (without added milk and butter)
1 cup sugar
1/2 cup milk
1/4 cup butter or margarine, softened
3 eggs
1 teaspoon salt
1 teaspoon vanilla extract
TOPPING:
1/2 cup packed brown sugar
1/2 cup chopped pecans
1/4 cup all-purpose flour
2 tablespoons cold butter or margarine