Have you ever pulled a two-year-old bag of flour out of the cupboard and wondered if it was still good to use? As a recipe developer, I go through a bag of flour every couple of weeks, so I wondered how long does flour last and how the heck do I store it? Is there any way to know when it's gone bad? "I advise people to remember that flour is perishable — it's not salt, it's not sugar, and it's definitely not inert. Take care of it," says Martin Philip, an award-winning author, baker, and baking ambassador for the King Arthur Baking Company. Taking a closer look at different types of flour the grains themselves will help give us the answers.
