On a recent visit, I asked for extra cheese at In-N-Out and got EXTRA cheese (as shown above), but did you know that this insanely popular burger chain has its own secret menu? I'm not talking "animal style" or "grilled cheese", which most regulars already know about. I'm talking about the "Flying Dutchman", "Chopped Chilis", or did you know you could order a Neopolitan shake? Well, now you do. For a full list, visit HERE.