But his Kryptonian Code Against Killing would prevent him from actually slaughtering the cow, so the beef wouldn’t be that fresh.
(His ability to tenderize the beef, on the other hand, would be second to none.)
He’s a farmboy. He’s killed chickens for dinner.
League can’t make chili con carne, anyway.
Animal Man wouldn’t allow it.
But we’d have a killer veggie chili going.
However, in any food competition, Captain Marvel has the distinct advantage of being an ingredient.
That is, if you like to eat big red cheese.
Even if the X-men come up with a better recipe to start, Firestorm can do a quick analysis of the chemical composition, then duplicate it.
So the JLA will at least tie.
As the originator of this thread, I have to declare JLA the winner because of Green Arrow’s proven chili propensities. Whatever superpowers the various heroes have must fall by the wayside when you have a superhero who is canonically into cooking chili. Even if he uses beans.