McDonald's Egg McMuffin is the original on-the-go breakfast. It's such an icon of the brand, that it's easy to forget that the Egg McMuffin almost didn't make it onto the menu—but lucky for us ...

McDonald's uses eggs in all kinds of forms in its breakfast items, but only one of its famed sandwiches includes an egg cracked fresh to order.

Sales of the Egg McMuffin grew by double digits following ... and all that flavor that you want in the sandwich." To make sure McDonald's is getting the right portion of butter on every sandwich ...

But what's surprising is the sandwich that helped put McDonald's breakfast on the map isn't at the top of everyone's list to order — that honor belongs to the Egg McMuffin. Cue in the Sausage ...

The bacon Egg McMuffin is similar to the Burger King version when it comes to the amount of bacon. I know a company can't heap slice after slice of bacon on every sandwich, but come on ...