Have the same issue. Did everything I can think of. Assume its just bugged for some people. Tried picking up Chef on an existing 80 character that didn't have it learned. Tried on a brand new character I made today and did all the other achievevments on (think it was level 52). Tried on main, who is 500 chef, by switching to another and then back to cooking. Tried crafting on all on them just in case, but nada. Lindsay Murdock posted in a Reddit thread, saying it should give credit just by switching out of chef and then back on any character. EDIT: Just noticed in that same thread an update. A trainer in the starting zone gives different credit compared to city trainers because of the 500 cooking quests. So trying the starter zone trainers to unlock cooking (it worked for me going to the Queensdale hub with the trainers). ok ill try in starter zone Thanks