Almond flour typically has a shelf life of 6 to 12 months when stored correctly. Unopened almond flour can last longer, often 2 to 4 months in a pantry, but this duration significantly increases if you store it in the refrigerator or freezer. When kept in an airtight container in the fridge, almond flour can last up to a year. If you choose to freeze it, you can extend its shelf life even further, allowing it to last for up to two years (source: Real Simple).

Several factors can influence how long almond flour lasts:

Storage Conditions: Almond flour should be stored in a cool, dark place. Exposure to heat, moisture, and light can accelerate spoilage.
Packaging: Always transfer almond flour from its original packaging to an airtight container after opening. This helps to keep out moisture and pests.
Type of Almond Flour: Blanched almond flour, which is made from peeled almonds, may have a different shelf life than almond meal, which includes the skins. Generally, both should be treated similarly in terms of storage.

Even with proper storage, almond flour can spoil. Here are a few signs to look for:

Visual Inspection: Check for any discoloration or mold. If you see green, black, or white spots, it’s time to discard the flour.
Smell Test: Fresh almond flour should have a mild, nutty aroma. If it smells rancid or off, it’s likely spoiled.
Texture Check: Almond flour should be fine and slightly gritty. If you notice clumps or a hardened texture, it may have absorbed moisture and gone bad.
Taste Test: If you’re unsure, a small taste can help. Rancid almond flour will have a bitter or off flavor (source: Ditch the Wheat).

Using expired almond flour is generally safe as long as it doesn’t exhibit signs of spoilage. However, it may affect the flavor of your baked goods. If the flour has gone rancid, it could lead to an unpleasant taste and potentially cause foodborne illness (source: Ditch the Wheat).

To maximize the shelf life of almond flour, consider the following storage tips:

Use Airtight Containers: Transfer almond flour to an airtight container immediately after opening to keep moisture and pests out.
Refrigerate or Freeze: Store almond flour in the refrigerator or freezer for longer shelf life. If freezing, make sure to seal it well to prevent freezer burn.
Keep it Dry: Always use clean, dry utensils when scooping out almond flour to avoid introducing moisture.

Almond flour is a fantastic ingredient for gluten-free baking, but knowing how long it lasts is crucial for maintaining quality and safety. Proper storage can extend its shelf life significantly, while regular checks for signs of spoilage will help you avoid using bad flour. By following these guidelines, you can enjoy the benefits of almond flour in your recipes without the worry of waste or spoilage. Whether you're making pancakes, bread, or cookies, fresh almond flour will ensure your baked goods are delicious every time.