You say Over Baked cookies~ I say round Granola Bars

Last week when I was baking cookies, I decided to turn the oven off and let them sit in there for a couple more minutes because they weren't quite done.  That would have worked out perfect if I hadn't forgot about them and went shopping for a hour.  When I got back from the store my house smelled so good.  Like someone was baking fresh cookies, OMG my cookies, I forgot about them.  I ran to the oven to see if I could save them.  They weren't burnt but they were brown and looked like they were as hard as a rock.  I got them off the cookie sheet and in to the refrigerator.  I wanted stop the cooking process and hopefully these cookies were be great for dunking into a glass of milk.    They were bad cookies but great granola bars, you know the hard bars...not soft and chewy.