Just put a pizza in the oven (I live the high life) and noticed that it says 'make sure product is piping hot (or similar)'. I know this means thoroughly hot but where does the saying come from? Thanks.
Quote:
"The derivation of this little phrase is the sizzling, whistling sound made by steam escaping from very hot food, which is similar to the sound of high-pitched musical pipes"
Chris' answer makes sense. I have met this question before and up to now thought it was.....
Chefs use piping bags to pipe hot potatoes and other stuff on the plate/dish in a fancy form. This food needs to be hot as when it is cold it goes stiff and is impossible to squeeze though a piping bag.