Is it ok to mix breast milk and formula?

Yes: You can mix breast milk and formula at any time. This is helpful when trying to wean from breastfeeding before your baby is old enough to have whole milk. Do not use breast milk to mix in formula powder.

Yes: Sure. Just try to be sure you use just the amount of breast milk that you think your baby will need for the feeding as it should not be refrigerated or frozen again after it has been defrosted. It is not harmful to mix both together and feed the milk to your baby if you feel your baby needs more milk that you are able to provide for each feeding.