Easiest fudge recipe in the world

Easiest fudge recipe in the world, can't mess it up if you tried.

1 can Eagle brand condensed milk ( 14 oz )
1 1/2 bags of chocolate chips ( 11.5 oz bags is what I use) any flavor you wish
1 cup chopped walnuts ( optional )

Toss all ingredients in to a mircowave bowl, melt till creamy pour into a 8x8 baking dish, cool for 2 hours cut and serve