Can I use formula to make pudding for my baby?

I made some custard from a recipe found on Australian Heinz baby website using my baby's formula which she seemed to really like. Baby’s own custard Serves: 2 serves Ingredients: 100mls baby’s regular milk – breast milk or prepared formula 2 teaspoons custard powder or arrowroot. Method: Pour breast milk or prepared formula into a small saucepan and heat gently. In a small bowl mix custard powder with a little water to a thin paste. Add to milk and stir until mixture thickens. Spoon out required amount into baby’s bowl. Allow to cool. Refrigerate remaining portion.