A square approximately 3 in by 3 inch (maybe a little bigger) and about an inch thick of a peanut butter mixture with peanuts inside topped with thick chocolate and some chopped peanuts. They used to also have a top and bottom layer of graham crackers but now that they have returned the graham cracker hasn't been included. Which is fine with me, I think they taste even better without them, but I don't like graham crackers much.