I toured Sara Lee Bakeries when I was a kid and they had scrap bins in laundry carts but it went to a local pig farmer. I used to make these in my bakery to use up all the trim from my cake layers. We kept a 5-gallon bucket, as most bakeries do, where we throw all the trims and once a week make rum balls. So each time, they were a little different depending on the content of the scraps.