We used to have a dude in our college dorms who used to sell Cup of Noodles with a spoon of peanut butter inside for like 3 bucks. It's a GREAT and cheap meal after those late nights at the bar.
This is how I upgrade all my noodles. Everyone asks my secret to make them creamy and nutty. I tell them "Add the ingredient in your kitchen called 'chunky peanut butter'" None of them believe me.