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Other than Fireball, What's the best spell for cooking?
(ttrpg.network)
Remember to always check creative uses of spells with your DM.
This presents several problems.
What is "one object"? A proper suit of platemail is like 30 objects, the helm is a different object to the breastplate, and that is a different object to the left sabaton. Such a ruling could cause a lot of table arguments.
Why is "a banquet" different to "a suit of platemail" in this regard? They're both comprised of several smaller components that could individually be described as objects?
The spell doesn't explicitly say "you can only make one object" it repeatedly, and irresponsibly careens wildly from using singular examples, and using plurals. The first line of the spell text is "You convert raw materials into products of the same material." (plural) It then gives examples of "a bridge, a rope, clothes" (singular, singular, plural).
I don't see a sage advice on this issue specifically but Crawford has answered "can you make a full set of artisans tools with a casting of fabricate" with yes - and most sets of tools aren't "one object" either...
Remember to check creative uses of your spells with your DM. Your DM is at risk and your DM can go down as well as up, and you may not get back all the DM that you put in.
If it's on a single line on a chart in the PHB, it's one object.
In this case, Aristocratic level meals for a day is a single line on a chart in the PHB, so we're good.
But then so is a level 20 wizard.
The Bard has his own spell for that one ( ͡° ͜ʖ ͡°)
It may take 18.75 or more years though, depending on species.