Prestidigitation is No.1
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Aways having a nice warm tea or cold beer available, even if its just flavored water![]()
Flavoring food is vastly underrated. Descent to Avernus /spoiler/
mentions that food tastes like nothing but ash in hell....but not with magic sriracha.
I never understood this mentality. Eating and drinking are activities that are typically ignored or glossed over in D&D. So odds are, you won't even get to say that you are using the Prestidigitation cantrip to flavor your food.
Even if food & drinks come up, I don't quite see the appeal in saying an imaginary character is eating better tasting food. Beside, Prestidigitation doesn't affect the nutritional value of a meal, so harmful/bad food remains bad food.
Honestly if you really want to pretend your character eats something yummy, just say that for dinner your PC is cooking a delicious stew with the rabbits that the Outlander of the party just caught. It will have effectively the same effect, but you won't have to spend one of your precious cantrips on it.
RP-wise, I would say adventurers care highly about not dying. To most, learning a vain/comfort cantrip like Prestidigitation instead of something that could actually save their life would be an head-scratching decision.