When I was in high school, we always used to eat Granny B's sugar cookies- this huge sugar cookie that was soft and chewy and covered in pink frosting and sprinkels. One cookie had like 400 hundred calories, but who cares about such things when you have a sixteen year old's metabolism.
I found this recipe for Lofthouse Cookie Bars from Cookies and Cups. It's a sugar cookie base made in a cookie sheet, covered in yum frosting. And sprinkles.I'm not sure these are too Lofthouse-y, but they are amazing. Chewy and sweet. And a LOT. I recommend making a batch and giving at least half of them away. Before you eat them all.
Cookies and Cups has the recipe here. And check out her blog. Delicious.