Stiff foam. Pour some the normal way, then dollop on one blob for the face, another blob on the top, two blobs for the ears. Use a utensil (thermometer, etc) to shape the ears into points. Dip a toothpick into either the colored foam at the edges or some moist powdered chocolate, delicately draw on features. It's pretty simple with a deft hand and some practice. Unfortunately, creamier foam tastes better... though some people do like the really dry stuff. Go figure.