Expiration & Storage Tips
When does unsweetened chocolate expire?
Unopened unsweetened chocolate can last almost indefinitely when stored in a cool, dry place. However, for the best flavor quality, it's recommended to use it within 2 years of the 'best by' date printed on the package. Once opened, unsweetened chocolate can last up to a year in the pantry as long as it's wrapped tightly in plastic wrap, resealed in a zip-top bag, or stored in an airtight container. If frozen (in an airtight container), it can last indefinitely, but should be used within a year to ensure best flavor.
How do you tell if unsweetened chocolate is bad?
Cocoa butter in the chocolate can separate over time and form white or gray 'blooms' on the surface. This isn't harmful and can often be resolved by melting the chocolate. However, if the chocolate develops an off smell or taste, or becomes slimy or moldy, it should be discarded.
Tips for storing unsweetened chocolate to extend shelf life
• Always store unsweetened chocolate in a cool, dry, dark space away from strong odors, as chocolate can absorb smells.
• Wrap opened unsweetened chocolate tightly in plastic wrap or reseal it in a zip-top bag to prevent exposure to air.
• If you choose to freeze unsweetened chocolate, wrap it closely in plastic wrap before placing in an airtight bag or container. To defrost, just move it to the fridge and allow it to thaw slowly to prevent condensation from forming on the surface.
• Protect your chocolate from temperature fluctuations which can cause 'blooming'. This doesn't affect the taste or safety, but can change the texture and appearance.