My response is going to be NO help, I'm afraid. I had the same problem and wandered Middle Earth looking for the recipe, only to find it in a "well duh!" moment. The problem is, I don't remember where!!!!!!!!! I'm thinking it was at the superior farm field north of Hobbiton, but that should have been the first place I looked. The only point to my answer is to tell you that it's in an obvious place and you don't have to go far afield to get it. (I went all the way to Rivendel looking for it.)
Told you it would be no help.
Officer and elder member of the Claws of Abigail kin.