Grease a 9x13 inch pan or line with parchment paper (this way you can lift out of the pan and it's easier to cut). If you are going to fill cookie cutters, line a cookie sheet with parchment paper then set the cookie cutters out.*
Brake up the candy bars and put in a bowl. Add the chocolate chips and nuts. Set aside.
Melt the butter, sugar, evaporated milk and marshmallows in a large pot over medium-low heat. Using a whisk, bring to a low boil and boil 8 to 9 minutes. Stir constantly.
Remove mixture from the heat and add the bowl of chocolate and nuts. Mix well then pour into prepared pan. Chill before cutting.
*Use a measuring cup to scoop fudge and pour inside the cookie cutters.
Notes: This is a soft, creamy fudge and is best kept in an airtight container in the refrigerator until ready to serve.
Recipe by Baked in AZ at http://bakedinaz.com/milk-chocolate-no-fail-fudge/