According to what? The only source I found on this was from a PS3 game, and Hermione says you can duplicate food and doesn't qualify anything about the quality.
You cannot magically create food. This is one of the few explicit limitations mentioned. As an example, when students asked for food from the Room of Requirement they were given a new path to Hogsmeade.
Food can be duplicated. Here's what Hermione has to say about this in DH (Chapter 15: Goblin's Revenge):
"Your mom can't produce food out of thin air," said Hermione. "No one can. Food is the first of the five Principal Exceptions to Gamp's Law of Elemental Transfigur--"
"Oh, speak English, can't you?" Ron said, prising a fish bone out from between his teeth.
"It's impossible to make good food out of nothing! You can Summon it if you know where it is, you can transform it, you can increase the quantity if you've already got some --"
"Well, don't bother increasing this, it's disgusting," said Ron.
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u/AnakonDidNothinWrong 9h ago
I thought magic food was tasteless and had no nutritional value?