Thanks for compliments!
I have tried different ratio and I came to conclusion that I like 50/50 as I can add breast milk after water, lye and oil are well blended so that breast milk is least affected. You can theoretically make 100% breast milk (or any milk) but your milk is more likely to be affected when mixing with lye. I am not a chemist, but you can google and find out what will come out when these two substances are mixed.
Breast milk has 3-4% of fat depending on what you eat. I consider it as super fat.
I also made 50/50, different combination of OO, cocoa butter, and CO. I also used rice bran oil instead of OO, mango butter instead of cocoa butter etc. OO and cocoa butter ones are nice but not so bubbly at 10 weeks.
Yes, breast milk is precious, and making soap is great way of making use of left over.