Honestly, I personally would never use old milk for anything other than discarding- I have a thing about old milk or even milk that is a day before it's use by date. I didn't even know you could use old milk for anything, but sure enough......
http://thegreenists.com/food/tip-of-...ired-milk/1055
I guess you could bake this for a treat!
http://bakin-n-bacon.typepad.com/bak...iled-milk.html