What is the primary ingredient in a Spicy Chicken sandwich?

The primary ingredient in a Spicy Chicken sandwich is the Spicy Chicken Patty. This patty is specifically formulated to enhance the sandwich's flavor profile with its spicy seasoning and breading, which differentiates it from other offerings such as charbroiled options or beef patties. The Spicy Chicken Patty is designed to provide the signature heat that characterizes the sandwich, making it a popular choice among customers looking for a flavorful and spicy meal. The other options, while part of different menu items, do not play a role in defining the Spicy Chicken sandwich, which is centered around the unique qualities of the Spicy Chicken Patty.