Final answer:
Cinnamon and nutmeg powder typically last for about 2 years when stored in airtight containers. This timeframe is much longer than most dried herbs, which tend to last around six months under proper storage conditions. For best quality, using them within 2 years is recommended.
Step-by-step explanation:
The shelf life of cinnamon and nutmeg powder is generally longer than many other dried herbs. While dried herbs often last up to six months if stored correctly, spices like cinnamon and nutmeg can have a longer shelf life. Typically, cinnamon and nutmeg powder can last for about 2 years when stored in airtight containers in a cool, dark place. This ensures their flavor and potency is preserved over time. Although they may not 'expire' in a way that they become unsafe to eat, their flavor and aroma will diminish over time, so it's best to use them within this time frame for optimal quality.