Fantastic fudge

I've long searched for a genuine old fashioned fudge recipe that uses real cream and butter, and no marshmallow cream. Haven't found one yet, but this version that a couple of my neighbors use is swell. Smooth, creamy, melt in your mouth good. It's supposedly one of those mysterious famous recipes that someone paid a whole lot of money for, got mad and gave it to all their friends.

Here you go:
4 1/2 cups of sugar
1 can evaporated milk
2 sticks of butter (no margarine!!)
2 bags of chocolate chips (I used half milk and half semisweet. I think next time I'll do both semisweet. One of the ladies actually adds a third bag of chips to the mix.)
1 7 oz jar of marshmallow cream

Slowly bring the sugar and evaporated milk to a boil over medium heat, stirring frequently and scraping the sides of the pan down. Boil for 10 - 12 minutes (no longer!!), then remove from heat and stir in the butter, chocolate chips and marshmallow cream until smooth and well combined. Immediately pour into a buttered 9x13 pan and allow 12 hours to set.

You may add nuts, marshmallows, caramel, coconut and other flavors according to your preference.