My New Favorite Sandwich!
I first tried this with a product called Speculoos Cookie Butter. My wife bought a jar of it at Trader Joe's. Since she hadn't been back, I've been doing without... until I found the original at Wal-Mart! It is called Lotus Biscoff Spread. I am sure it is not all that healthy. It is made from cookies, but it has no nuts in it (for those with allergies).
If you check out the official website, you will see it's history and they will also point out that it is Vegan. :)