Can You Freeze Baby Puree With Formula. To make it thinner, add cooking liquid, water, breast milk, or formula. An efficient way to make baby food is to make big batches of one vegetable or fruit purée at a time and freeze them in ice cube trays for up to two months.

The same guideline applies to baby formula: Once you have a nice liquid baby food puree you will then transfer the puree into ice cube trays for freezing/storage. Mix it with another puree as desired, such as applesauce, banana.