This is a very very rich pie.  The cooking time while low maintanence has you carmelizing sweetened condensed milk,

1 large Graham Cracker Pie Crust
2 cans sweetened condensed milk
1 small container of Cool Whip
1 small pkg. chopped pecans
1 pkg. Nestle mini chocolate chips

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 pot to rolling boil and boil for 3 hours making sure to turn cans every 30 minutes or so. At the end of 3 hrs allow cans to cool for 1 hr. (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 hrs. DELICOUS. This can be dangerous so be sure you never leave cans boiling on the stove without checking them