McDonalds has a PR campaign going on that their food is something we would make at home. Here's a video on how to make the Big Mac ( one my favorite splurge foods in college) which includes the 'Secret Sauce'. Chef Dan mentions in the video that the 'Secret Sauce' ingredients can be found online on the McDonald's site, so it's not so secret. Although what is a secret is how much of those ingredients. Can you figure out the rations?
I'm going to have to try this at home and see if I can come close.