Oh she is a young baby. She can probably eat as much as she wants as I think it's almost impossible to over feed a kitten. Try feeding 4 meals of wet food of a good Quality all stages cat food. I would say about 2 Oz, but see if she can manage it all and judge from there. She should eat like this for a few months while in the growing stage. You could also add a little water to the food to help her hydration.
I am sure others will jump in with great advice. We have some members with huge kitten experience.