not a cook
notoriously kitchen-challenged friend to doctor about heat rash on her back:
friend: i've been using cortisone, but it's not working. is there anything else i can use?
dr: you could use cornstarch.
friend: cornstarch? what's that? do i have to buy that at the pharmacy or something?
dr: you can buy it at the grocery store. it's normally used in baking.
friend: oh, so that's why i don't know what it is!