Edries's Fudge

I got this fudge recipe from my ninety-something neighbor, Edries. She makes the best fudge, candy and hand-dipped chocolates. When I lived at home we always fought over her Christmas plate!

4 C. Sugar
1 Can evaporated milk
1/4 c. butter
1 jar marshmallow creme (7 oz)
1 tsp. vanilla
2 pkg. milk chocolate chips, or 1 pkg chocolate chips and 1 large hershey bar

Bring sugar, milk, and butter to a boil over medium heat (stirring constantly). Cook to medium ball stage. Take pan off heat and beat in remaining ingredients. Pour into buttered 9x13 pan.