Here is the instruction: How To Make Boutique Hair Bow--3--Center Knot
You need to put narrow ribbon on top so it'll show both top and base ribbon.
To add layers, what I did is to wrap each layer seperately and then wrap layers together. The image below, I make 2 2.25" basic bow using 7/8" ribbon, and stack together and wrap and then wrap the center and attach clip.
Hope this helps.