"Cinnamon Conundrum: Don't Panic About Lumpy Ground Cinnamon. If you've got a jar of ground cinnamon that's lost its smooth consistency, you're probably wondering if it's still safe to use. A common problem in many kitchens, clumpy cinnamon can be a nuisance, but a recent investigation has found that it's not a cause for concern. In fact, experts say that the texture change is simply a sign of the spice's natural aging process, and the flavor and potency remain unaffected."
Got a jar of ground cinnamon in your pantry that's full of clumpy bits? You're not alone, and you also don't need to stress about safety - here's why.