4 Dessert Moulds 5 "Perfect" Fatima 27 August 2012 I tried these two times for panna cottas.. I moved a sharp knife around them quickly before unmoulding and they slipped out easily. The design was beautiful just as shown in the picture. Very pretty. For the other review. I just pass a thin knife around it quickly. If it doesn't work, just slightly lift/tilt the top of the panna cotta from inside with the knife.. slip onto your plate..