What is the name of the story with good-looking food that tastes bland?

roderick_young asked:
I have a vague memory of a chapter book read to me when I was in 3rd grade (1967), in which there was delicious-looking food that had no taste at all, and bland-looking food that was actually delicious.
It was probably a famous book, possibly a Newberry award winner.
Does anyone know what the title [...]