Peel paper from cans of Eagle Brand Milk. Place cans on their sides in a large pot and cover completely in cold water. Slowly bring the pot to rolling boil and boil for 3 hours making sure to turn cans every 30 minutes or so.
At the end of 3 hours allow cans to cool for 1 hour (at least - this part is VERY important).
Open cans of Milk and spread into pie pan. Cover with Cool Whip. Sprinkle nuts and chocolate chips all over the top. Refrigerate for 8 hours DELICIOUS. This can be dangerous so be sure you never leave cans boiling on the stove without checking them.