I have been putting mandrake related items on the Egypt Centre website and noted that not only do we have at least one mandrake amulet from Amarna, shown above, but also several pieces of wall plaster from the North Riverside Palace. The North Riverside Palace was possibly the main royal residence at the site (Kemp 2006, 284).
Kemp, B. 2006 Ancient Egypt. Anatomy of A Civilisation.
You can see more of our mandrake items at: