Expiration & Storage Tips
When does flour expire?
Unopened flour typically lasts for about one year past the printed date on the package. After being opened, you can expect a good quality of flour for another eight months if stored properly. Whole wheat and other grain-based flours have a shorter lifespan and can stay fresh for about 3-6 months when unopened, and then 1-3 months after being opened. Flour can also be frozen to extend its life for up to two years.
How do you tell if flour is bad?
Telling if flour has gone bad is a multi-sensory task. First, check for any changes in the color. Most flours are white or off-white, and a yellowish tint can indicate that they are past their prime. Second, smell the flour. Fresh flour has a light, pleasant, grain-like smell. Any sour, musty, or otherwise 'off' smell is a sign your flour may not be safe to use. Lastly, inspect your flour for any signs of pest infiltration, like beetles or weevils, which are telltale signs the flour needs to be discarded.
Tips for storing flour to extend shelf life
• Store your flour in a cool, dark place. Heat, light, and moisture are the enemies of flour's freshness.
• Use an airtight container. Keeping your opened flour in its original bag won't protect it from the elements. Ideally, use glass or plastic airtight containers.
• Try to use older flour first – this is simply practicing first in, first out (FIFO).
• If you're looking to extend the shelf life of your flour even further, consider freezing it. Make sure it is sealed tightly to avoid moisture.