What is the main item offered at #21 on the menu?

The main item offered at #21 on the Jack in the Box menu is the Breakfast Croissant. This item features a flaky, buttery croissant filled with a combination of egg and either sausage or bacon, along with cheese. It is particularly popular for breakfast, catering to customers looking for a satisfying and portable option to start their day.

Understanding the menu numbering and items can help cashiers accurately respond to customer orders and guide them through their choices effectively. The other options are distinct sandwich offerings on the menu but represent different selections and meal categories that do not align with the specific number assigned to the Breakfast Croissant.