Does White Powder Expire? Important Facts About Flour and Baking Soda
Discover if white powder like flour and baking soda expires and learn how to test their freshness.
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White powder, such as flour or baking soda, does not exactly expire, but it can lose its potency and taste over time. Flour can go rancid due to the oils it contains, especially whole-grain varieties. Baking soda loses its effectiveness as a leavening agent. To test baking soda, add a bit to vinegar—if it fizzes, it’s still good. For flour, a musty smell indicates it’s no longer fresh.
FAQs & Answers
- How can I tell if flour has gone bad? If flour has a musty smell or shows discoloration, it is likely no longer fresh.
- Can baking soda lose its effectiveness? Yes, baking soda can lose its potency as a leavening agent over time. You can test it by mixing it with vinegar; if it fizzes, it's good.
- How long can flour be stored? White flour can typically be stored for up to a year, while whole-grain flour may last about 3-6 months.
- What’s the best way to store baking soda? Store baking soda in a cool, dry place, tightly sealed to maintain its potency.