If a filled chocolate develops a white haze, why might the filling be partly responsible even when the shell was decent chocolate?
Show answer & explanation
Answer: Filling oils can migrate
Filling oils can migrate ✓ — Correct. Fat-based fillings can send oils into the chocolate shell toward concentration equilibrium, changing the fat profile and texture. That can promote fat bloom and even soften the shell while the filling hardens. The payoff is that bloom can be an interface problem, not only a bad-temper problem.
Centers release extra sugar — This is a sugar-bloom mix-up. Sugar bloom is driven by moisture or condensation dissolving sugar and letting it recrystallize, not by a dry filling simply releasing sugar into the shell. The useful contrast is oil migration versus water-mediated sugar crystals.
Uneven cooling causes it — Uneven cooling is a real-looking process problem, and temperature swings can accelerate bloom. But in filled chocolates the cited interface mechanism is oil migration from the center into the shell. That distinction matters because a barrier layer can help where better cooling alone may not.
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