Reply to "Reminder About Proper Crediting of Sources"

There is no need to credit originators of commonly used techniques, except for clearly known originators (like Montreal Confections for the paint-your-own cookie), for as you said, it's often difficult to say who originated a technique. But, if you directly copy another person's unique cookie design, a drawing, a sculpture, a painting, etc., these are obvious things where you should make best efforts to identify the artist and credit him/her.