A Witch's Grocery List

Double double toil and trouble. Help a witch out.
  1. Eye of Newt
    Essential.
  2. Hair of Dog
  3. The Blood Of A Virgin
  4. Two small German children.
    Only if you have a double oven.
  5. Crocodile scales
    Suggested by   @vickyb80
  6. A mermaid's tears
    Suggested by   @kait