No, but I think it may appear in one of the Malory Towers books. Probably spoken by that free-handed little bossyboots Darrell Rivers.
(Incidentally, I was just thinking about the Famous Five's food for some reason, and thought how healthy it all was, despite the fact Blyton is clearly feeding her characters what she considers great big fantasy blow-outs. Lots of ham and tongue and massive salads and fruit cakes and apple tarts and cheese and milk and eggs. I suppose rationing - and the fact that junk and fast food had yet to be invented - would do that.)