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" ...

Add Yahoo as a preferred source to see more of our stories on Google. 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 ...