The chain specializes in Chicago-style thin crust and Double-dough crust, and also offers traditional Chicago deep dish and stuffed pizza, but also offers other Italian dishes. Most of the menu is made from scratch. Rosati's own small sausage plant supplies Chicago-area units, and outside vendors reproduce the family sausage recipe elsewhere.
Most Rosati's use deck slate ovens rather than conveyor ovens because Sam Rosati preferred the crust characteristics that deck ovens produce.
Most Rosati's locations are small stores that are take-out or delivery specific, sometimes with facilities for a few diners, but without restaurant dining areas. The Gurnee, IL location can accommodate up to 30 families at one time with dine-in style seating.
As of 2011[update] a typical franchise investment in the company would be around $250,000 per store, according to published figures. Rosati's main competition in the Chicago area consists of many smaller, family-owned pizzerias and some large ones including Nancy's, Giordano's, Lou Malnati's, Aurelio's and Home Run Inn.