There are no hard rules about when (or when not to) wrap, but if maximum melt, softness, cohesion, soaking, or marinating are ...

So, if you have a juicy sandwich like a meatball sub, use wax paper instead. You can also wrap wet ingredients, like pickles, ...

The Earl of Sandwich may take all the credit for this genius food's name, but people have been putting ingredients between bread since the earliest recognizable sandwich in 110 BC (bitter herbs ...