Mac and cheese are one of the simplest, tastiest, and most joyful pasta experiences. Still, this cheesy delight is so good that it makes the eye very greedy, and before you know it, you are left with a pile of leftover mac and cheese. Sadly, one stiffened mac and cheese is not as creamy as it was when it was soft and warm. Since throwing it out is not an option, at least not a desirable one, you have to think of something to bring back the mac and cheese creaminess.