I have no idea. This has never happened to meIf you were frying meat, or a cutlet, and it burnt a bit, what do you say:
Yes, for me too. I can imagine a cook saying "it's a bit burnt I'm afraid" whilst they're serving it up to you on a plate nonetheless. If they said "it's slightly burnt" I think I would be expecting something really scorched since it's much more matter of fact.I have no idea. This has never happened to me
If it did, I would say "It's a bit burnt."
That is the most informal/ casual suggestion and in these circumstances I would want to emphasise the informal/ casual because it helps to play down my failure.