3 c. sweet potatoes, mashed
1/2 c. butter
3 eggs
1 c. granulated sugar
1 tbsp. vanilla

TOPPING:

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

Mix ingredients thoroughly (except topping) and pour into buttered casserole dish. Mix topping ingredients with fork until crumbly; sprinkle crumbs on top of casserole. Bake at 350 degrees for 20-30 minutes.