1 lb. butter, melted
1 c. sugar
1 tsp. vanilla
3 c. flour
2 c. crushed potato chips
1 c. chopped walnuts

Mix all ingredients until well blended. Grease and flour 9x13 inch pan, put cake mixture in pan. Chill 1 hour and bake in 350 degree oven for about 30 to 45 minutes.