No, KitKat does not contain egg. As a renowned teacher with expertise in various fields, I’m confident in clarifying that KitKat bars are primarily made of milk, sugar, cocoa butter, cocoa mass, and wheat flour, among other ingredients. The formulation doesn’t include egg. However, it’s always advisable to check the packaging or consult the ingredient list for specific dietary concerns or allergies. In my experience, understanding product ingredients is essential for making informed choices, especially for those with dietary restrictions.