Does unsweetened baking chocolate go bad?

Yes, unsweetened baking chocolate can go bad, but it has a pretty long shelf life if stored properly. Here's a breakdown:

How long does unsweetened baking chocolate last?

* Unopened: Up to 2 years if stored properly.

* Opened: 6-12 months if stored properly.

How to store unsweetened baking chocolate for the longest shelf life:

* Airtight container: Keep it in a cool, dry, dark place, preferably in the pantry or cupboard.

* Refrigerator: If you live in a humid climate, refrigeration can help prevent moisture absorption and potential spoilage.

* Freezing: Freezing is also a great option for long-term storage. Wrap the chocolate tightly in plastic wrap or aluminum foil before placing it in a freezer bag.

Signs that unsweetened baking chocolate has gone bad:

* White bloom: A white powdery coating may appear on the surface, which is called "fat bloom". This is typically harmless and indicates that the chocolate has been exposed to temperature fluctuations. It won't affect the flavor, but it can be scraped off.

* Off smell or taste: If the chocolate has a rancid, stale, or unpleasant smell or taste, it's best to discard it.

* Mold: If you see any mold growth, discard the chocolate immediately.

Note: If you're unsure whether your baking chocolate is still good, taste a small piece. If it tastes fine, you're good to go.