EDIT: Let’s cool it with the downvotes, dudes. We’re not out to cut funding to your black hole detection chamber or revoke the degrees of chiropractors just because a couple of us don’t believe in it, okay? Chill out, participate with the prompt and continue with having a nice day. I’m sure almost everybody has something to add.
I think the answer is complicated. Homo erectus, the first homo species thought to use fire and our direct ancestors were as close to obligate carnivores as there is in the homo genus, but they focused on big animals with a lot of fat like hippos and elephants. They likely did not cook that fat, because it would store just fine without doing so.