My chocolate has a dusty white coating — is it safe to eat?

6. How to Tell Bloom Apart From Mold or Spoilage

To differentiate bloom from mold or spoilage, examine the chocolate closely. Bloom is typically a uniform, whitish coating that does not significantly alter the chocolate's smell. Mold, however, can appear in various colors, such as green, blue, or black, and may have a fuzzy texture. Mold also tends to emit an off-putting odor, unlike bloom.
If your chocolate has a strange smell or visible mold, it's best to discard it. However, if it only has a white coating and no unusual odor, it's likely just bloom and safe to consume.
7. Simple Ways to Fix Bloomed Chocolate at Home
If your chocolate has developed bloom, there are a few simple methods to restore its appearance. For fat bloom, gently melting and re-tempering the chocolate can help redistribute the cocoa butter evenly and eliminate the white streaks. Use a double boiler or microwave at low power to melt the chocolate slowly, and then allow it to cool gradually to restore its shine.
Sugar bloom is more challenging to fix, as the sugar crystals have already formed on the surface. However, you can try melting the chocolate and using it in recipes where texture is less critical, such as in baking or making ganache.