3 c. mashed sweet potatoes
1 c. sugar
1 tsp. vanilla
1/2 c. butter

1 c. brown sugar
1 c. chopped nuts
1/3 c. flour
1/3 c. butter, softened

Mix above ingredients with mixer until smooth. Put in souffle dish and sprinkle topping over it. Bake at 350 degrees for 30 minutes.