Panna cotta divided
I made coffee panna cotta yesterday from a Nigella Lawson recipe. When I unmolded one I realized it had divided into two distinct layers, one quite dark and rubbery (bottom layer in the mold) and the other light with a mousse-like consistency. I've never had this happen with panna cotta; it's very attractive but I'm not crazy about the consistency. Any ideas what might have happened?