Hi,
I would like to ask can you add royal icing sugar to help stiffen up fondant icing, as i am trying to make a bow but the fondant keeps breaking.

This is my first attempt at making this, I am new to cake baking.
Any help much appreciated

You need to add gum-tex, tylose or CMC.

I am not sure about the royal icing sugar but I have make a couple decorations out of fondant that I wanted to harden and I have just added extra powder sugar and made them a couple days ahead of time. Mine have all dried really nice and I had no trouble with any of them breaking!

You should add tylose powder (also called CMC) available in most cake decorating shops. If you add powdered sugar to it, it will just become dry and crumbly and harder to work with.

If you can't get hold of CMC, you need to use gumpaste. You can get this at cake decorating shops and Michaels (I think, not a US citizen) either ready made or as a mix.