When I was a girl my Daddy used to make this fudge every Christmas. He would cut it into pieces and layer it with waxed paper and put it in a special dish. When asked the recipe he always said it was a closely guarded secret. (Of course the recipe was on the back of the marshmallow cream jar). Sadly he passed away when I was 16. In going through his wallet, tucked away inside was the typewritten recipe for this fudge. Several years ago they changed the recipe a bit, and even though the recipe is right there on the jar, I always pull out Daddy's recipe to use and keep the tradition of making this each year.
3 cups sugar
3/4 cup butter or margarine
2/3 cup evaporated milk
1 tablespoon vanilla
1 12 oz. package semi-sweet chocolate chips
1 7 oz. jar marshmallow cream
1 cup chopped pecans
Combine butter, sugar, and milk in a heavy 2-1/2 quart pan. Bring to a full rolling boil, stirring constantly. Continue boiling for 5 minutes over medium heat. Remove from heat. Add chocolate, marshmallow cream, and vanilla. Stir quickly to melt chocolate. Pour into a buttered 9 x 13 pan. Cut into 1 inch squares.