Fantasy Fudge

3 C sugar
3/4 C butter
2/3 C evaporated milk
1 12oz pkg (2 C) Semi Sweet Chocolate Chips
1 7oz jar marshmallow cream
1 C chopped nuts, optional
1 Tbsp vanilla
Combine sugar, butter, and milk in a heavy saucepan; bring to a full rolling boil, stirring constantly. Continue boiling 5 minutes over medium heat, stirring. Remove from heat, stir in chocolate until melted. Add marshmallow cream, nuts and vanilla, beat until blended. Pour into buttered 9x13 pan. Cool.