Every McDonald’s fan knows that whether you’re going to the fast food chain for a Big Mac, Quarter Pounder, Filet-O-Fish, McNuggets, or even a simple order of fries, you can’t leave without a fountain drink. Mickey D’s has always been highly regarded for its sodas—and for good reason. 

There’s just something about a McDonald’s Diet Coke or Sprite that hits different. And actually there is something that makes the fountain sodas stand out—and, according to our taste test, better—than any other fast food restaurant. 

So, how does McDonald’s do Diet Coke so well?

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