Fantasy Fudge

I've had this before and I always wanted to make it myself. It was really easy to do and great to freeze for the holidays coming up.

Fantasy Fudge
3 c sugar
3/4 c butter
2/3 c evaporated milk (5 ounces)
1 1/2 pkg Baker's semi sweet baking chocolate squares, chopped (I actually used Hershey's semi sweet chocolate chips...no chopping :))
1 jar (7 ounces) marshmallow creme
1 c walnuts (optional)
1 tsp vanilla

Line 9" square pan with foil overhanging the sides. Place sugar, butter, and evaporated milk in heavy saucepan and bring to a full rolling boil on medium heat, stirring constantly. Boil 4 minutes or until candy thermometer reads 234 degrees, stirring constantly to prevent scorching. Remove from heat.
Add chocolate and marshmallow creme. Stir until melted. Add nuts and vanilla, mix well.
Pour into prepared pan evenly. Let stand at room temperature for 4 hours or until cooled completely. Cut into 1" squares.