The primary ingredient in a risotto is Arborio rice, a short-grain, starchy rice that is crucial for creating the dish's characteristic creamy texture. As the rice cooks, it releases starches into the cooking liquid, which helps to thicken and enrich the dish. Traditional risotto recipes often include broth, butter, onions, and a variety of other ingredients such as vegetables, seafood, or meats, along with cheese, particularly Parmigiano-Reggiano, at the end of cooking. The creamy texture of risotto comes from the slow cooking and constant stirring, allowing the rice to absorb liquids gradually while releasing its starch.