There is no such item as Blessed Elven Bread that I know of. If I recall correctly, there was a vendor material called Blessed Elf Flour. This item no longer exists in game. The various Cook recipes were changed to use a Cook made ingredient called something or other Flour. There are several kinds of this Flour. I think there is a Flour recipe for every tier.
The closest thing to Blessed Elven Bread is the Lembas and the Lothlorien Waybread recipes. Both of those are Cook recipes. Blessed Elf Flour was an ingredient for one or both of these recipes.
The confusion that you are experiencing is something that you have to get used to. Turbine keeps changing the game. The fan site do not upgrade their documentation to reflect the current state of the game. You will often find old stale information that is no longer valid.
To keep us on our toes, there are aspects of the game that Turbine hasn't touched since 2007. The guides from almost six years ago are still valid.
Unless stated otherwise, all content in this post is My Personal Opinion.