Hi there I want to make cream pasta sauce for ...

Hi there I want to make cream pasta sauce for my ds I saw the pasta receipe for 6-9 months old babies it's says to put 150 ml of milk I'm wondering I can use formula as he can't have cows milk He is fully bf and I have karicare formula that I was given by the nurse and I have never used it so I'm thinking that can b boiled to replace cows milk If yes how do u boil it Do u make the formula first and boil it ? How long? Thanks