completely (about 1 hour or so) and then dust it with the powdered sugar. i would say use a sifter of some kind so you don’t make the mess i did or add as much as i did since you are just looking to dust it with the powdered sugar.
flip the whole thing over, don’t worry if it breaks when you do, and dust the other side too.
once you have dusted both sides break the candy up along the lines you scored into it and place in a large zip-lock or other storage bag.
also, each piece has around 80-90 calories (depending on the size you make or break them) based 