As the title says, is it safe to consume flour once its past its expiry date or should it be thrown away?
The main things that can go bad with flour, assuming it is properly stored are:
- Insect infestation
If you don't see any insects, and it still smells good, you should feel free to use it. If it smells off or nasty—trust me, your nose will tell you—then you will want to discard it.
The actual date on the bag is only a guideline.
Normally no problem. But check if there is flour worms in the flour. To do so, follow these steps:
- Fill up a plain glass with flour.
- Press together the flour, so you get a flat / hard surface, slightly below the rim of the glass.
- Let the jar stand in a bright and warm spot for about 1-2 hours.
If you have flour worms, some very small larvae (less than 1 mm) will break the smooth surface of the flour, and get visible.
If you have these larvae, you should throw everything you have of flour products in your closet and wash your closet thoroughly. Otherwise, the expiration date is not all the world to care about when it comes to dry goods.