1 c. evaporated milk
2 c. miniature marshmallows
6 oz. pkg. Toll House chocolate bits
1/2 c. sugar
1/4 tsp. salt
1 tbsp. butter
1 tsp. vanilla
1 c. chopped walnuts
2 pkgs. Nabisco graham crackers

Cook first 5 ingredients until melted. Cook and stir to a full all-over boil, 5-6 minutes. Remove from heat. Gradually stir in remaining ingredients. Press into 9 inch buttered pan; chill 1 hour.