The silver decorative thing on kaju katli is a Vark/Varak which is known
as silver leaf, German paper.  The flavorless silver and gold leaves are
completely edible. This varq is used on the Indian/Asian sweets to make
them look more appetizing.
Recommended Next Step: To get answers to all your questions about this recipe, such as cooking method, tips and tricks, and best ways to serve it, go to "Kaju Katli Recipe - Kaju Burfi - How to Make Kaju Katli"