Once the royal icing designs on the cello bags dry, you can carefully remove them. You can attach them to your wet icing or let the icing dry and add them with a small amount of royal icing.

Royal icing transfers are a game changer for me. You can make them ahead of time so you can easily add them to your flood icing.

Here are a few tutorials that will show you all my patterns so far and how easy they are to remove them from the cello bags or wax paper:

Candy Eyes- https://thebearfootbaker.com/candy-eyes/
Royal Icing Transfers- https://thebearfootbaker.com/royal-icing-transfers/
https://thebearfootbaker.com/easy-witch-hat-sugar-cookies-for-halloween/
https://thebearfootbaker.com/fun-royal-icing-acorn-transfers-for-your-sugar-cookies/