Adapted from Kraft's original Fantasy Fudge
3 cups sugar
3/4 cup butter (1 1/2 sticks)
2/3 cup evaporated milk
12 ounce package semi-sweet chocolate chips
7 ounce jar Kraft Marshmallow creme
1 teaspoon vanilla
Combine sugar, butter and milk in a heavy saucepan.Bring to boil. I cover with a lid for about a minute to make sure all the sugar is dissolved...remove lid and insert candy thermometer into liquid. Continue boiling for approximately 5 minutes over medium heat, stirring frequently till thermometer reaches 234º. Remove from heat, stir in chocolate till melted. Add marshmallow creme and vanilla and stir till blended.
Pour into greased 8 x 8 inch baking pan. Let cool and cut into squares.