Ever wonder what they call the middle bun on a Big Mac?

There's a lot to the Big Mac and McDonald's newest menu item, the Chicken Big Mac.

The traditional Big Mac is a burger with two all-beef patties, special sauce, pickle, lettuce, onion and cheese. The new version of the sandwich swaps out the beef for tempura-breaded chicken patties.

That's a long list of ingredients to put on a sandwich, but it is actually designed to be assembled in less than 25 seconds once the chicken comes out of the fryer.

READ MORE: What It Means If You See A McDonald's With Black Arches

It's probably easy to do if you know your way around a McDonald's kitchen. I tried to put one together myself during a recently tasting and press event at McDonald's Chicago headquarters and failed miserably.

From the amount of sauce to what other familiar item uses the same breading, here are 7 wild facts about McDonald's newest menu item.

7 Wild Facts About McDonald's Chicken Big Mac Sandwich

Gallery Credit: Rob Carroll

10 Totally Random Facts About McDonald's Chicken McNuggets

Did you know it wasn't originally supposed to be chicken in the McNugget? Do you remember the original four dipping sauces?

Gallery Credit: Rob Carroll

Look Inside The World's Oldest McDonald's in Downey, California

The world's oldest McDonald's in Downey, California originally opened 1953, nearly five years after the company was founded. The location is like walking into a time capsule. Retro characters, a walk-up counter and a museum make this one of the most unique dining experiences for McDonald's lovers. Here is a look at what the Downey, California McDonald's looks like today.

Gallery Credit: Rob Carroll

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