Unmold ramekins: Fill a large bowl partway with warm to hot water. Run a thin knife carefully around the sides of a ramekin. to release the top edge of the pudding from the edge of the cup. Dip the ramekin in the warm water up to its rim, and hold it there for about 2-3 seconds. Turn the ramekin upside down on a dessert plate shake gently to help the panna cotta onto the plate.