I am familiar with a FO containing vanilla discoloring and have seen it happen from the outside in. See 1st pic. Last night I made a soap that I am currently cutting and the white appears very white on the outside, but has a very light beige tint on the inside. I’m not sure how well you can see it in the pic. Could this be from the goat milk powder I added? My mold was still warm to the touch this morning so it may have gelled. I don’t use GM often so I’m not quite sure if this is the explanation or not.