2 c. mashed sweet potatoes
3/4 c. white sugar
2/3 stick butter
1/2 tsp. vanilla
1 c. brown sugar
1/3 c. soft butter
1/3 c. flour
1 c. chopped nuts

Mix first four ingredients and put in casserole dish. Mix next four ingredients and sprinkle on top. Bake at 350 degrees for 25 minutes.