As a food science expert, I can tell you that the white appearance on your chocolate could be due to a few different factors.


1. Bloom: This is the most common cause. There are two types of bloom:
- Fat Bloom: Occurs when the chocolate is improperly tempered or stored in a warm environment, causing the cocoa butter to separate and rise to the surface.
- Sugar Bloom: Happens when excess moisture is present, causing the sugar to crystallize and appear as a white powder on the surface.


2. Mold: If the white substance is fuzzy or has an off smell, it could be mold, which is a sign that the chocolate has been stored in a humid environment for too long.


3. Milk Powder: In some cases, the whiteness could be a result of milk powder that is used in the chocolate-making process, especially if it's a milk or white chocolate.


4. Puffiness: Sometimes, the whiteness is simply a result of the chocolate being handled too much, causing it to "puff up" or form a lighter-colored surface.


5. Storage Conditions: If the chocolate was exposed to fluctuating temperatures or high humidity, it could cause changes in its appearance.

To determine the exact cause, you would need to consider the conditions under which the chocolate was stored and handled. If you're unsure, it's best to err on the side of caution and not consume the chocolate.

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That white discoloration that sometimes forms on old chocolate turns the stomachs of chocolate lovers everywhere. For years, researchers have known that the harmless change, known as a fat bloom, is caused by liquid fat such as cocoa butter migrating through the chocolate and crystalizing on the candy's surface.read more >>