Sweet Potato Soufle

3 c cooked and mashed sweet potatoes
3/4 c white sugar
1/3 c butter, softened
2 eggs
1 tsp vanilla
1/2 c milk
1/3 c all purpose flour
1 c packed brown sugar
1 c chopped nuts
1/3 c melted butter

Preheat oven to 350.
Combine mashed sweet potatoes, with white sugar, soft butter, beten eggs, vanilla and milk.
Spoon into 2 quart oven proof baking dish.
Combine flour, brown sugar, chopped nuts and melted butter.
Sprinkle over top of sweet potatoes.
Bake for 30-35 minutes.