Yes, the Philips Avent SCF355 bottle warmer is designed to safely warm both frozen breast milk and baby food. However, it is important to follow proper guidelines. Start by defrosting frozen breast milk or baby food in the refrigerator. Once partially defrosted, transfer it to a suitable container and select the appropriate heating time on the bottle warmer. Do not use the bottle warmer to defrost frozen items directly. Always check the temperature of the warmed contents before feeding your baby.