Both of them is basically means the same, but the second one is what we use in daily language and more proper.

They are not the same meaning. One of them is a question in the future time and unless you talk to yourself you don't ask yourself such question. However, if you change the subject to -for example- 'you' it makes more sense. The second question is like an offer rather than a question. it is like 'what would you want me to cook for dinner?'