Easy Fudge recipe (fave here)

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 any flavor you wish
1 cup chopped walnuts ( optional )

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