Cooking Mama? Cooking 'Mama'. Come on, now--all that's doing, surely, is perpetuating the stereotype that mum does all the cooking. Why not Cooking Papa? Well... then that sounds faintly Italian, which makes the whole game look like the Dolmio adverts. Which I actually happen to quite like, even though they should, by rights, be abhorrent. I mean, puppets, accents... on paper there's surely nothing worse in the whole world.
But all of this can be solved simply by calling the game 'Cooking person'. It's non-gender-specific, explains that the game will feature a person doing some cooking and actually avoids the other interpretation of the title that some could otherwise have taken to mean the game is about putting your mother in a big cauldron and turning the heat up. So basically, this is miles better.