Rupiani's Authentic Chicagoan Deep Dish Pepperoni PizzaChicago style deep dish has exactly one non negotiable: the water. Rupaini's builds each crust from Chicago water and a proprietary flour blend before loading it with a pound of Wisconsin mozzarella, layers of Italian pepperoni, and a secret recipe tomato sauce. The pies ship nationwide, bringing the same crust, cheese, and sauce that made the original worth the trip. No flight to Chicago required.