With all of the restaurant brand collaborations in the history of the industry, not once has such a partnership happened between Chicago heavyweights Portillo’s and Lou Malnati’s. That’s about to change.

The companies–two of the top five most visited restaurants in the Windy City–today announced the new Lou Malnati’s x Portillo’s Italian Beef Deep Dish Pizza, available for shipping nationwide exclusively through the Tastes of Chicago website.