Creamy-Sure Fudge

1 1/3 cups grandulated sugar
2/3 cup undiluted evaporated milk
1/4 cup butter
1 7oz. jar marshmallow cream
1/4 tsp. salt
1 tsp. vanilla
12 oz. semi-sweet real chocolate pieces
1 cup chopped walnuts (optional)

Stirring constantly, bring first 5 ingredients to boil, cook exactly 5 minutes. Remove from heat, add vanilla, stir in chocolate till melted, add walnuts. Turn into buttered 8 in. pan. Let stand till firm, cut into squares.