As an older miscer I feel an obligation to impart some of my knowledge and experience on you younger brahs...

What I've noticed:

The best cooks tend to be average weight, or a few extra pounds. If a girl is obese, it's pretty much guaranteed that she can't cook worth a damn, she just always gets fast food (which is why she's so fat to begin with). Obese women are also much more likely to have obese moms, who also mostly eat fast food, so she never learned to cook from her mother, the family just ate fast food all the time, or just microwaved ****. There was no continuity of knowledge passed from mother to daughter. As for super skinny chicks, they usually have some sort of disorder so they are unlikely to be good cooks.

tl;dr if you want a chick who will cook you some bombass food, look for an average weight or slightly above average weight one. Obviously there are exceptions but this is what I've noticed during my several decades of dating.