is it possible to make a cheese sauce without using milk? i've tried buttermilk and man was it gross. i tried vegetable broth but it was pretty blah as well. my goal with this sauce is to make macaroni and cheese with a roux base sauce. I'm making it for my toddler who has a cow's milk allergy but seems to be ok with cheese and butter. I'm not sure why he's ok with butter but i'm going with it.