Mix and put in greased casserole:

3 c. or more cooked sweet potatoes or lg. can yams
2 eggs
1 c. sugar
1 c. golden raisins, optional
1/2 stick melted butter
1 tbsp. vanilla

Mix and put on top:

1/2 c. flour
1/2 stick melted butter
1 c. walnuts
1 c. brown sugar

Bake 1 hour at 350 degrees.