Lactation cookies?

So I'm trying to exclusively breastfeed my LO, my supply was amazing until a few weeks ago when a misdiagnosis by a Dr had her on neocate. The couple of weeks we tried her on it my supply started to dwindle and now I'm looking to boost it back up rather than having to formula supplement. Anyone tried lactation cookies before? They're supposed to be great but I wanted some more opinions before trying to find brewers yeast in my little town!