This is my CP charcoal soap with goat milk. It is a batch of my true and tested recipe. I have made it hundreds of times. I made it following all the standard soapmaking methods. Poured and went to sleep. I went to unmold it today and I found myself scratching my head. At the bottom there were was some caustic liquid. At the top 1mm there is a white layer of soap (not soda ash). Any ideas what could have caused this?
Above is the top and here is the bottom
Above is the top and here is the bottom