We've all been there: you just finished baking a delectable birthday cake and are getting ready to adorn it with frosting, sprinkles, and candles. But then you realize, you don't have a piping bag!

Cooking food in a sealed parchment paper or foil pouch (called en papillote) is a technique embraced by dieters; it's considered healthy because it uses very little fat. This doesn't mean it's ...