What else to do with milk?

Ashley • Mommy to a beautiful baby girl born May 26th! Second beautiful girl born April 30th! 💜💜 #girlmom

I’ve come to the conclusion that my daughter doesn’t do well with my breast milk so I am choosing to switch to formula full time. But I’ve got several bags of frozen milk still, is there anything you can do with them that will still benefit her in some way? I don’t really wanna donate because I’m not sure what in my breast milk is upsetting her tummy and don’t want it to bother another baby. Any ideas appreciated. Thanks!