Customers Are Lining Up For This Secret Menu Item At In-N-Out

In-N-Out enthusiasts, have you ever heard of a "Monkey Style" burger? I've heard of Animal Style (mustard-cooked beef patty, pickles, extra spread and grilled onions) and Protein Style (lettuce-wrapped burger), but never Monkey Style. The beauty of the West Coast burger chain's simple menu is the different tiers of customization you can accomplish with a simple base of hamburgers, cheeseburgers, fries and drinks. In-N-Out still claims they have no "secret menu," although they've acknowledged a f...