basically what the question says. Of course, magic must preserve the conversation of energy. Baking is defined in the normal way:
the action of cooking food by dry heat without direct exposure to a flame, typically in an oven.
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Think of all the time/effort/energy that is used in the cooking of Food. Especially in a Medieval setting.
That's now gone.
That frees up a significant portion of time to devote to non-necessity pursuits.
Then there is the other reason for cooking food - not only does it taste yummy, but it kills bugs/parasites/bacteria - meaning it's safer to eat and there was a study from 2012 that indicated that cooked Meat in particular is good for brain growth - so to answer your question:
We needed to spend less time cooking (cause magic) and we grew bigger brains (cause cooked meat) - which causes a significant societal pivot into Science and Technology, leading to a much shortened time period to achieve space travel.