Oh no, no it's not! You just said "I want to bake you in a some kind of a blueberry pie".
I'd say: Haluan tehdä sinulle mustikkapiirakkaa. or Haluaisin tehdä sinulle mustikkapiirakkaa.
The latter is like "I'd like to make you some pie" and the first one is "I want to make a pie". I don't know where you need this translation so you can choose yourself which one you'll use.