While buying spice in bulk is much cheaper per ounce than buying them in regular sizes, it could end up causing you storage issues, and the herbs could lose their efficacy before you use them, Epicurious reported.  Rhoda Boone, the food director of video for Epicurious and Bon Appétit, urges shoppers to "[b]e realistic" when buying in bulk. "Check the expiration date. If the item has one, think about if you'll really use the amount you're buying in that time. You're not really saving money if you're going to throw spoiled food away."

Often, you'll find that you use spices in pretty small quantities, so, having 16 ounces of something might be more than your household needs. Cathy Erway, a food writer and the author of "The Art of Eating In: How I Learned to Stop Spending and Love the Stove," explained why spices aren't a great buy at Costco or other warehouse stores. "Large quantities of dried spices might seem way more economical, but if you're not planning to use it like a commercial food processing plant, then it'll get stale and lose its oomph after a few months," Erway said. One exception is if it's a spice you use in multiple meals every day. If that sounds like you, then you will likely save money buying it in larger quantities.