Hi JanElsner,
Cooked has over 23,000 recipes, so there really isn't an easy way to add their entire catalogue to your Bookshelf. However, unless I have misunderstood what Cooked offers, I believe with a membership you can access all of the recipes in each of the cookbooks they have featured on their site? (Please correct me if I am wrong!) So, my best suggestion would be to go through the list of books available on Cooked and add them to your EYB Bookshelf. I would recommend adding both indexed and unindexed books so that if a title gets indexed in the future, the recipes will automatcally appear on your EYB Bookshelf. I would also add a "Cooked.com.au" Bookmark so you know where those "books" are located in your recipe collection. This suggestion won't really work if all the recipes in a given book are not on Cooked though, so please let me know if that information is correct.