You should taste it first - here, try cracking the surface with your spoon.

*Kurapika hands Pairo the spoon and leads his hand to the surface of the dessert, resting the back of the spoon on the smooth, hard, crystallised sugar surface. He wants Pairo to have the first crack, as it were, at the dessert - because the satisfaction of breaking the surface might help with the disappointment he might feel should he still taste nothing when he puts it in his mouth.*