I am making this sauce, which is extremely hot (as in hot peppers) that is being served cold (as in temperature). People who try it ask me what it is, so I say it is "cold hot sauce", which is a bit problematic, as the two are literal antonyms, even if not in the particular context.
So is there another world I could use for (extremely) hot that makes it clear it is indeed very hot? "Spicy" comes to mind but it is a big understatement. Anything else?