Keep powdered milk on hand in case you run out of regular cow's milk—it's shelf-stable for up to 18 months. Milk powder is made by evaporating milk to the point where it becomes completely dry. Just ...

Milk, as we all know, is perishable. In fact, it may be the most famously perishable food in existence: It's not for nothing that we say something that's lost its luster over time has "aged like milk" ...