Fantasy Fudge

3 cups sugar
1 7 ounces jar marshmallow creme
1 5 1/3 ounce evaporated milk
1 teaspoon vanilla
3/4 cup margarine
1 cup chopped nuts -- optional
1 12 ounces pk chocolate chips

Combine sugar, margarine, and milk in heavy 2 1/2 qt. saucepan. Bring to full rolling boil, stirring constantly. Continue boiling 5 minutes over medium heat. Till candy thermometer reaches 234ºF, stirring constantly.

Remove from heat; stir in chocolate until melted. Add marshmallow creme, nuts, and vanilla; beat till well blended. Pour into a greased 13x9 pan.

Cool at room temperature; cut into squares.