The chocolate dessert of the nineties, these little cakes are baked to a crisp outside and a warm, melting center that acts as sauce. The recipe makes eight servings, and one key to success is leaving the batter to stand overnight. Then the cakes must be baked just long enough to hold a shape while the center remains soft. Don't worry if they overbake and set firm; they are still the very best of chocolate puddings.