Bleghmar treats. Aghh Herk.

[atlasroar]

How do I unlock the recipe. As the Wikipedia is a little..lacking. And almost 2 hours of searching here and Reddit has granted me little to no knowledge about this I'm stumped on whether or not I can complete the ahh Herk quest. I'm returning to the game after about 2 years and as far as I can tell I wasn't paying attention and used them up. I'm unsure how to unlock the recipe in order to complete the quest.