Won't let me discover "Spicy Pumpkin Cookie"
I think there is a recipe for it
Skullclamp
http://www.gw2db.com/items/70967-recipe-s-spicy-pumpkin-cookie
You are going to need to wait until next Halloween.
As the others have said, you need to use a Recipe in order to learn how to make these. I’m not sure if that specific recipe (which was sold by a merchant) is Account Bound, but if you don’t see them for sale on the TP, it probably is.