Ideas for using frozen breastmilk?

Au

Hello! So I have about a dozen 4oz bags of frozen breastmilk that I don't know what to do with. My LO is 14 months and won't take it in a bottle anymore and she didn't like oatmeal made with it. I make her squeeze pouches and I tried using the milk in that but the fat content in the milk is so high it made the pouches nearly impossible to clean!

Anyone have ideas? I've offered it to my girlfriend who's nursing but her freezer stash is overflowing.