How Long Does Flour Last, and When Should You Throw It Out?
That bag of flour in the back of the pantry may still be usable long after its best-by date—but not always. White all-purpose flour keeps longer than whole-grain or nut flours, and smell, appearance, and storage matter more than the date alone. A three-year-old bag is worth inspecting carefully. If it smells sour, musty, or like old oil, or if you see bugs, webbing, discoloration, or damp clumps, toss it. Cookies aren’t worth a rancid aftertaste. The Type of Flour Makes a Big Difference All-purpose flour lasts the longest because it has had most of its natural oils removed. Those …










